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9 Pro
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Galaxy S21+
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What we think

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The PerfectRec phone team Learn more
Updated January 10, 2024·

If you prioritize camera capabilities, the Samsung Galaxy S21+ has slightly better overall quality, with a higher megapixel telephoto camera and support for HDR10+ in video. However, the OnePlus 9 Pro also performs well in camera quality, offering more RAM for potentially smoother performance. Both have similar battery life, but the OnePlus has a slight edge in battery longevity. If screen resolution is important, the OnePlus 9 Pro provides a higher display resolution. Both phones have a similar size and weight, high refresh rates, and no headphone jack. For those interested in an alert slider, only the OnePlus 9 Pro includes this feature. Both run on Android, share the same processor, offer 5G connectivity, and are similarly priced, but decide based on which features align best with your preferences. 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 OnePlus 9 Pro
  • Best in class display quality
Advantages of the Samsung Galaxy S21+
  • Very good battery life

Key differences

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Video Quality

6.0
9 Pro
Galaxy S21+
6.6
The Samsung Galaxy S21+ and OnePlus 9 Pro both have only fair videos, though the Samsung Galaxy S21+ takes somewhat better videos.

Battery

6.9 Hours
9 Pro
Galaxy S21+
8.0 Hours
The OnePlus 9 Pro has 6.9 hours of battery life. The Samsung Galaxy S21+ has 8 hours of battery life.
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Key similarities

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Overall Camera Quality

7.2
9 Pro
Galaxy S21+
7.2
The Samsung Galaxy S21+ and OnePlus 9 Pro both have good overall cameras quality.

Photo Quality

7.0
9 Pro
Galaxy S21+
7.0
The OnePlus 9 Pro and Samsung Galaxy S21+ both have good photos.

Screen Size

The OnePlus 9 Pro has a screen size of 6.7 inches and the Samsung Galaxy S21+ is 6.7 inches.

Cost

$350
9 Pro
Galaxy S21+
$340
Product imageProduct image

$150

$200

$250

$300

$350

$400

$450

$500

The OnePlus 9 Pro has a price of $350 and the Samsung Galaxy S21+ costs $340.

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How the OnePlus 9 Pro and the Samsung Galaxy S21+ compare to other phones

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Spec Comparison

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OnePlus 9 ProSamsung Galaxy S21+
OnePlus 9 ProSamsung Galaxy S21+

GENERAL

Price
$350
$340
Brand
OnePlusSamsung
Operating System
AndroidAndroid
Release Date
March 30, 2021January 29, 2021

SCREEN

Screen Size
6.7"6.7"
Resolution
3216 x 14402400 x 1080
Variable refresh rate
YesNo
Pixels Per Inch
525394
Display Type
OLEDOLED

INTERNAL

Processor
SD888SD888
Internal Storage
128 GB128 GB
RAM
12 GB8 GB

CAMERA

Overall Camera Quality Score
7.2/107.2/10
Photos Score
7.1/107/10
Videos Score
6.1/106.6/10
Rear Cameras
Main, Ultrawide, TelephotoMain, Ultrawide, Telephoto
Main Camera
48 megapixels + OIS12 megapixels + OIS

BATTERY

Battery Life
6.9 Hours8 Hours
Battery Capacity
4500 mAh4800 mAh
Wireless Charging
YesYes
Wireless charging Speed
50 W15 W
Reverse wireless charging
Yes (4.5 watts)Yes (4.5 watts)

PHYSICAL

Size
6.43" x 2.9"6.36" x 2.98"
Weight
6.95 oz7.05 oz
Back Material
GlassGlass
Stereo Speakers
NoNo

CONNECTIVITY

Dual SIM
NoYes
Bluetooth Version
5.25.0
A2DP
YesYes
WiFi Version
66
NFC
YesYes
US 5G Bands
(SA/NSA/Sub6/mmWave)1, 2, 3, 7, 25, 28, 41, 66, 71, 78, 258, 260, 261 (SA/NSA/Sub6)41, 78(SA/NSA/Sub6/mmWave)2, 5, 25, 41, 66, 71, 260, 261 (SA/NSA/Sub6)1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 66, 77, 78

OTHER FEATURES

Biometric unlock
Face unlock, Fingerprint sensor: Under DisplayFace unlock, Fingerprint sensor: Under Display
Unlockable Bootloader
YesNo
Color
Stellar Black, Forest Green, Morning MistPhantom Black, Phantom Silver, Phantom Violet, Phantom Pink, Phantom Gold, Phantom Red
Stock Android
NoNo
SD Card
NoNo

Shopping

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OnePlus 9 Pro

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Dig into reviews and images

TechRadar

James Peckham | April 2021
"The OnePlus 9 Pro offers phenomenal performance, a vastly superior camera to the brand’s previous smartphones, and a variety of top-end features that make this a serious contender for anyone who’s in the market for a premium Android handset.The 6.7-inch 120Hz QHD display is among the best we’ve seen on a smartphone, with plenty of detail, strong brightness, and a variety of other tweaks. If you like to watch a lot of video on your phone in particular, this is a great option."

Samsung Galaxy S21+

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Dig into reviews and images

Tom's Guide

Jordan Palmer | May 2022
"All told, Samsung nailed it with the Galaxy S21 Plus. It has most of the strengths of the smaller S21 in a bigger package. It’s got a lot going for it. If you’re coming from an older device, like the Galaxy S10 series, this is a solid upgrade."

Get a great deal on the OnePlus 9 Pro or the Samsung Galaxy S21+

About OnePlus

OnePlus, established in 2013, is a smartphone brand that first became known for providing flagship-like devices, at a fraction of the cost compared to more expensive Android competitors. OnePlus focuses on creating smartphones with powerful hardware at reasonable prices. They also bring hardware features normally not seen in other Android phones sold in the US, such as their ultra-fast “Warp Charge” and the beloved “Alert Slider”.

About Samsung

Samsung is one of the most recognizable names in the smartphone industry, standing as the undisputed best-selling brand of Android smartphones in the United States for many years now. Samsung is known for offering a variety of smartphones in all available price points, as well as for implementing cutting-edge technology and innovative features in their flagship devices, ones that often shape the market going forward. The company offers its own unique spin on Android, called One UI, which focuses on offering a multitude of features and is heavily customizable, according to user preference.

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Why trust us

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This information was produced and vetted by the PerfectRec phones team. We are a product research and recommendation organization that meticulously reviews and evaluates the latest phone information and makes it digestible for you.

By the numbers

68
Phones evaluated
7,820
Phones stats compiled
8
Proprietary Phones ratings developed
98,100
Recommendations made
55,590
Consumer hours saved

About the phone team

Joe Golden, Ph.D

CEO and Phones Editor
Joe is an entrepreneur and lifelong electronics enthusiast with a Ph.D in Economics from the University of Michigan.

Jason Lew

Staff Expert & Software Engineer
Jason is a staff expert and software engineer that has been making laptop recommendations for 7 years and moderates one of the largest laptop subreddits.

Chandradeep Chowdhury

Staff Expert & Software Engineer
Chandradeep is a staff expert and software engineer and expert in televisions and monitors. He’s been making monitor recommendations for ten years.

Seth Peoples

Phones Expert
Seth is a US-based product expert focusing on smartphones and he is a moderator of one of the largest smartphone subreddits. His tailored recommendations have helped him earn over 87k comment karma, putting him in the top 1% of Redditors.

Efthimis Kotanidis

Phones Expert
Efthimis is a Greece-based product expert focusing on smartphones. He has been recommending phones for 4 years and his recommendations on Reddit have earned him over 35k karma.

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