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Updated January 10, 2024·
The ASUS ROG Flow Z13 and the Lenovo Slim Pro 9i are similarly priced with robust performance for general use, engineering, and 3D/machine learning tasks. The ASUS has a slightly smaller screen and is more portable, making it suitable for on-the-go users. It offers high refresh rates and a quality display. However, the Lenovo counters with a larger screen, higher display resolution, more RAM for multitasking, and a higher contrast ratio, benefiting tasks that require superior screen detail. The Lenovo's battery capacity is more substantial, yet it's heavier, which can affect portability. Both have touchscreens, similar GPU performance, and are capable of intensive gaming, but consider the ASUS for portability and the Lenovo if screen size and multitasking power are priorities. Give Feedback
this description is based on the product variant with some specs and product variant with some specs. At the time of writing, the variant with some specs cost some dollars and the variant with some specs cost some dollars.
Advantages of the ASUS ROG Flow Z13
- Excellent portability
Advantages of the Lenovo Slim Pro 9i
- Best in class overall display quality
- Very good speakers
- Very good keyboard
Key differences
Engineering and Design
8.4
8.9
9.5/10
OVERALL CPU SCORE
9.0/10
6.2/10
OVERALL GPU SCORE
6.9/10
16.0 GB
RAM
32.0 GB
The Lenovo Slim Pro 9i and ASUS ROG Flow Z13 are both very good for engineering and design, though the Lenovo Slim Pro 9i is somewhat better.
The ASUS ROG Flow Z13's Intel i9 processor and 16GB of RAM are overshadowed by the Lenovo Slim Pro 9i's Intel i7 processor and 32GB of RAM, making the latter more capable for intensive engineering tasks, despite the Z13's high portability and its ability to double as a tablet.
Screen Quality
8.4
9.6
13.4in
SIZE
14.5in
2560 x 1600
RESOLUTION
3072 x 1920
IPS
DISPLAY TECHNOLOGY
Mini LED
165Hz
REFRESH RATE
165Hz
511.0 nits
BRIGHTNESS
618.0 nits
The Lenovo Slim Pro 9i has a better screen than the ASUS ROG Flow Z13 for general use, gaming and AI, engineering and design, content creation, and software development.
When considering general use, the Lenovo Slim Pro 9i stands out with a display that offers sharp resolution and high brightness, making it excellent for everyday tasks like browsing and watching videos. For engineering and design, both laptops have substantial displays, but the Lenovo edges ahead with superior color accuracy, essential for tasks that demand precise color representation. However, for gaming and 3D applications, despite their high-resolution panels, both lack the faster refresh rates preferred for smooth motion, making them less ideal for high-end, fast-paced gaming experiences.
Portability
Excellent
Good
13.4in
SIZE
14.5in
2.6 lbs
WEIGHT
3.7 lbs
0.5in
THICKNESS
0.8in
The ASUS ROG Flow Z13 has excellent portability, while the Lenovo Slim Pro 9i has good portability.
The most portable laptops are small, thin, and light.
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Key similarities
General Use
8.0
8.5
2560 x 1600
RESOLUTION
3072 x 1920
IPS
DISPLAY TECHNOLOGY
Mini LED
511.0 nits
DISPLAY BRIGHTNESS
618.0 nits
6.5 Hours
BATTERY LIFE
6.0 Hours
7.5/10
KEYBOARD QUALITY SCORE
8.0/10
9.2/10
PORTABILITY SCORE
7.6/10
The Lenovo Slim Pro 9i and ASUS ROG Flow Z13 are both very good for general use.
The ASUS ROG Flow Z13 is praised for its high-quality screen, solid battery life, and unique versatility with a detachable keyboard that doubles as a tablet, making it exceptionally portable with great performance for general use. The Lenovo Slim Pro 9i stands out with its premium build and very good keyboard, alongside improved RAM and screen quality, offering a more comfortable and visibly sharper experience for extended use, even though it's slightly less portable.
Gaming and AI
7.5
7.6
6.2/10
OVERALL GPU SCORE
6.9/10
2560 x 1600
RESOLUTION
3072 x 1920
165Hz
REFRESH RATE
165Hz
Yes
SUPPORTS DLSS
Yes
Yes
MUX SWITCH / ADVANCED OPTIMUS
No
7.2/10
FAN NOISE SCORE
8.0/10
The Lenovo Slim Pro 9i and ASUS ROG Flow Z13 are both good for gaming and AI.
The ASUS ROG Flow Z13 and Lenovo Slim Pro 9i are both equipped with Nvidia RTX 4050 GPUs, which are top-tier for gaming and 3D rendering, and they have high screen refresh rates of 165Hz for smooth visuals. While the ASUS has a powerful Intel i9 processor and an IPS screen which delivers good color accuracy and viewing angles, the Lenovo boasts a higher RAM capacity, a Mini LED screen for better contrast and brightness, which can enhance the visual experience for gaming and creative work.
Content Creation
8.2
8.5
9.5/10
OVERALL CPU SCORE
9.0/10
2560 x 1600
RESOLUTION
3072 x 1920
16.0 GB
RAM
32.0 GB
IPS
DISPLAY TECHNOLOGY
Mini LED
The Lenovo Slim Pro 9i and ASUS ROG Flow Z13 are both very good for content creation.
PerfectRec’s Content Creation Score takes into account the many different features of the laptop that make it more or less suitable for photo editing, video editing and other content creation tasks.
Software Development
8.0
8.3
9.5/10
OVERALL CPU SCORE
9.0/10
16.0 GB
RAM
32.0 GB
2560 x 1600
RESOLUTION
3072 x 1920
7.5/10
KEYBOARD QUALITY SCORE
8.0/10
The Lenovo Slim Pro 9i and ASUS ROG Flow Z13 are both very good for software development.
PerfectRec’s Software Development Score takes into account the many different features of the laptop that make it more or less suitable for software developers.
Battery
6.5 Hours
6.0 Hours
The ASUS ROG Flow Z13 has 6.5 hours of battery life. The Lenovo Slim Pro 9i has 6 hours of battery life.
Battery life estimate is based on a mix of common use patterns. More portable and higher performing laptops tend to have less battery life.
Build Quality
8.5
8.0
The ASUS ROG Flow Z13 and Lenovo Slim Pro 9i both have very good build quality.
PerfectRec’s Build Quality Score incorporates case materials, display and keyboard flex, hinge quality, and overall reliability.
Cost
$1,575
$1,500
$500
$1,000
$1,500
$2,000
$2,500
The ASUS ROG Flow Z13 has a price of $1,575 and the Lenovo Slim Pro 9i costs $1,500.
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How the ASUS ROG Flow Z13 and the Lenovo Slim Pro 9i compare to other laptops
Spec Comparison
 |  | |
| ASUS ROG Flow Z13 | Lenovo Slim Pro 9i |
GENERAL | |||
|---|---|---|---|
| Price | |||
$1,575 | $1,500 | ||
Release Date | |||
Release Date | May 1, 2023 | February 1, 2023 | |
Overall Dimensions | |||
Overall Dimensions | 11.9'' x 8.1'' x 0.54'' | 12.9'' x 9.6'' x 0.85'' | |
Weight | |||
Weight | 2.6 lbs | 3.7 lbs | |
Width | |||
Width | 11.89" | 12.9" | |
Depth | |||
Depth | 8.11" | 9.64" | |
INTERNAL | |||
|---|---|---|---|
Processor | |||
Processor | Intel i9-13900H | Intel i7-13705H | |
RAM | |||
RAM | 16 GB | 32 GB | |
DDR Memory Version | |||
DDR Memory Version | 5 | 5 | |
RAM Slots | |||
RAM Slots | 0 | 0 | |
Storage | |||
Storage | 1024 GB | 1024 GB | |
BATTERY | |||
|---|---|---|---|
Battery Life | |||
Battery Life | 6.5 Hours | 6 Hours | |
Battery Capacity | |||
Battery Capacity | 56 Wh | 75 Wh | |
SCREEN | |||
|---|---|---|---|
Diagonal Size | |||
Diagonal Size | 13.4" | 14.5" | |
Display Technology | |||
Display Technology | IPS | Mini LED | |
Resolution | |||
Resolution | 2560 x 1600 | 3072 x 1920 | |
Refresh Rate | |||
Refresh Rate | 165Hz | 165Hz | |
Display Brightness | |||
Display Brightness | 511 nits | 618 nits | |
RELIABILITY, APPEARANCE & ACOUSTICS | |||
|---|---|---|---|
Build Quality Score | |||
Build Quality Score | 8.5/10 | 8/10 | |
Portability Score | |||
Portability Score | 9.3/10 | 7.7/10 | |
Gaming Laptop Appearance | |||
Gaming Laptop Appearance | Yes | No | |
Premium Business Laptop | |||
Premium Business Laptop | No | No | |
Fan Noise Score | |||
Fan Noise Score | 7.3/10 | 8/10 | |
HARDWARE FEATURES | |||
|---|---|---|---|
Keyboard Quality Score | |||
Keyboard Quality Score | 7.5/10 | 8/10 | |
Speaker Quality Score | |||
Speaker Quality Score | 7.5/10 | 8/10 | |
Webcam | |||
Webcam | 4K | 1080p | |
Fingerprint Reader | |||
Fingerprint Reader | No | No | |
Backlit Keyboard | |||
Backlit Keyboard | Yes | Yes | |
Number Pad | |||
Number Pad | No | No | |
CONNECTIVITY | |||
|---|---|---|---|
USB Type-A | |||
USB Type-A | 1 | 2 | |
USB-C ports | |||
USB-C ports | 2 | 2 | |
USB-C Charging | |||
USB-C Charging | Yes | Yes | |
Display Outputs | |||
Display Outputs | 3 | 3 | |
Thunderbolt Version | |||
Thunderbolt Version | 4 | 4 | |
Shopping
ASUS ROG Flow Z13
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Dig into reviews and images
NotebookCheck
Andreas Osthoff | March 2022
"The Asus ROG Flow Z13 is a gaming tablet with powerful Alder Lake i9 CPU. The ROG Flow Z13 impresses with its good cooling. After our review, the impression is predominantly positive. Besides a very fast Alder Lake CPU and stable gaming performance, especially the cooling system is surprisingly effective and quiet. You can use the integrated speakers without any issues while gaming. The 1200p display in the 16:10 format also impresses with good color reproduction and high brightness. Since the battery runtimes aren't particularly long as it is, we wouldn't recommend the optional 4K panel."
Lenovo Slim Pro 9i
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Dig into reviews and images
PCWorld
Matthew S. Smith | August 2023
"The Lenovo Slim Pro 9i is an impressive laptop with a brilliant Mini-LED display, a powerful 100-watt version of Nvidia RTX 4050 graphics, and excellent connectivity. Having run the Cinebench benchmark again, we were impressed with the CPU performance. That makes the Slim Pro 9i is an easy recommendation, especially for those who care about GPU and CPU performance. It’s also a fantastic choice if you frequently view HDR movies and games on your laptop."
Get a great deal on the ASUS ROG Flow Z13 or the Lenovo Slim Pro 9i
About ASUS
ASUS, a Taiwanese electronics brand, is one of the largest personal computer vendor by market share. The majority of their laptops are targeted towards personal use or gaming. Their most popular product lines include the budget-friendly VivoBook, more premium ZenBook, and their TUF and ROG gaming laptops, the latter of which has a reputation for excellent gaming performance.
About Lenovo
Lenovo is a Chinese technology company, and one of the largest personal computer vendor. They are well known for a variety of technology products, including laptops. Their consumer series include their entry level IdeaPad and LOQ series and mid-to-high-end Yoga and Legion series. On the business-oriented side, their series include their entry-level ThinkBook series and mid-to-high-end ThinkPad series. Lenovo laptops offer strong performance for reasonable prices, and are often on sale.
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