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Updated January 10, 2024·
If you prioritize a more pocket-friendly size, a plastic body that may be less susceptible to damage, or front-facing stereo speakers, the Asus Zenfone 9 could be well-suited to you, despite its higher cost. However, if you seek a larger screen with a curved edge, a more vibrant screen estate due to higher resolution, or wireless charging features, the OnePlus 9 Pro offers those advantages at a lower price point. Both phones offer quality cameras, high refresh rate displays, and robust performance, but consider that the OnePlus 9 Pro has an older processor and might not perform as well as the Asus with newer, demanding applications. 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 Zenfone 9
- Good battery life
Advantages of the OnePlus 9 Pro
- Good for taking photos
- Fair for recording videos
- Best in class display quality
- Good performance
Key differences
Overall Camera Quality
6.2
7.2
The OnePlus 9 Pro has good overall camera quality, while the Asus Zenfone 9 has only fair overall camera quality.
The OnePlus 9 Pro has better cameras than the Asus Zenfone 9 largely because it excels in areas like photo software experience, photo dynamic range, and photo low light performance. Additionally, the OnePlus 9 Pro offers a more versatile camera system and a higher selfie camera quality, which is particularly important for those who frequently take self-portraits.
Photo Quality
6.0
7.0
The OnePlus 9 Pro takes good photos, while the Asus Zenfone 9 takes only fair photos.
The OnePlus 9 Pro takes good photos because it has a higher selfie quality score and better camera versatility than the Asus Zenfone 9, which results in overall stronger photographic performance. While the Zenfone 9 is competent, its lower selfie score and significant shortcomings in dynamic range and low light performance contribute to its inability to match the OnePlus 9 Pro in photo quality.
Battery
7.8 Hours
6.9 Hours
The Asus Zenfone 9 has 7.8 hours of battery life. The OnePlus 9 Pro has 6.9 hours of battery life.
Screen Size
The Asus Zenfone 9 has a screen size of 5.9 inches and the OnePlus 9 Pro is 6.7 inches.
Cost
$700
$499
$200
$400
$600
$800
$1,000
$1,200
The Asus Zenfone 9 has a price of $700 and the OnePlus 9 Pro costs $499.
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Key similarities
Video Quality
6.4
6.0
The Asus Zenfone 9 and OnePlus 9 Pro both have only fair videos.
The OnePlus 9 Pro takes better videos than the Asus Zenfone 9 primarily due to its superior video resolution and framerate, along with a more refined video software experience. Moreover, the OnePlus 9 Pro's video stabilization and dynamic range are rated higher, although its microphone quality is not as good as the Asus Zenfone 9's.
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How the Asus Zenfone 9 and the OnePlus 9 Pro compare to other phones
Spec Comparison
 |  | |
| Asus Zenfone 9 | OnePlus 9 Pro |
GENERAL | |||
|---|---|---|---|
| Price | |||
$700 | $499 | ||
Brand | |||
Brand | Asus | OnePlus | |
Operating System | |||
Operating System | Android | Android | |
Release Date | |||
Release Date | September 15, 2022 | March 30, 2021 | |
SCREEN | |||
|---|---|---|---|
Screen Size | |||
Screen Size | 5.9" | 6.7" | |
Resolution | |||
Resolution | 2400 x 1080 | 3216 x 1440 | |
Variable refresh rate | |||
Variable refresh rate | No | Yes | |
Pixels Per Inch | |||
Pixels Per Inch | 445 | 525 | |
Display Type | |||
Display Type | OLED | OLED | |
INTERNAL | |||
|---|---|---|---|
Processor | |||
Processor | SD8+G1 | SD888 | |
Internal Storage | |||
Internal Storage | 128 GB | 128 GB | |
RAM | |||
RAM | 6 GB | 12 GB | |
CAMERA | |||
|---|---|---|---|
Overall Camera Quality Score | |||
Overall Camera Quality Score | 6.3/10 | 7.2/10 | |
Photos Score | |||
Photos Score | 6/10 | 7.1/10 | |
Videos Score | |||
Videos Score | 6.5/10 | 6.1/10 | |
Rear Cameras | |||
Rear Cameras | Main, Ultrawide | Main, Ultrawide, Telephoto | |
Main Camera | |||
Main Camera | 50 megapixels + OIS | 48 megapixels + OIS | |
BATTERY | |||
|---|---|---|---|
Battery Life | |||
Battery Life | 7.8 Hours | 6.9 Hours | |
Battery Capacity | |||
Battery Capacity | 4300 mAh | 4500 mAh | |
Wireless Charging | |||
Wireless Charging | No | Yes | |
Wireless charging Speed | |||
Wireless charging Speed | 0 W | 50 W | |
Reverse wireless charging | |||
Reverse wireless charging | No | Yes (4.5 watts) | |
PHYSICAL | |||
|---|---|---|---|
Size | |||
Size | 5.77" x 2.68" | 6.43" x 2.9" | |
Weight | |||
Weight | 5.96 oz | 6.95 oz | |
Back Material | |||
Back Material | Plastic | Glass | |
Stereo Speakers | |||
Stereo Speakers | No | No | |
CONNECTIVITY | |||
|---|---|---|---|
Dual SIM | |||
Dual SIM | Yes | No | |
Bluetooth Version | |||
Bluetooth Version | 5.2 | 5.2 | |
A2DP | |||
A2DP | Yes | Yes | |
WiFi Version | |||
WiFi Version | 6e | 6 | |
NFC | |||
NFC | Yes | Yes | |
US 5G Bands | |||
US 5G Bands | (SA/NSA/Sub6)1, 2, 3, 5, 7, 8, 12, 20, 25, 28, 29, 30, 38, 40, 41, 48, 66, 71, 77, 78, 89 | (SA/NSA/Sub6/mmWave)1, 2, 3, 7, 25, 28, 41, 66, 71, 78, 258, 260, 261 (SA/NSA/Sub6)41, 78 | |
OTHER FEATURES | |||
|---|---|---|---|
Biometric unlock | |||
Biometric unlock | Fingerprint sensor: Side | Face unlock, Fingerprint sensor: Under Display | |
Unlockable Bootloader | |||
Unlockable Bootloader | No | Yes | |
Color | |||
Color | Sunset Red, Starry Blue | Stellar Black, Forest Green, Morning Mist | |
Stock Android | |||
Stock Android | Yes | No | |
SD Card | |||
SD Card | No | No | |
Shopping
Asus Zenfone 9
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Dig into reviews and images
Android Authority
Robert Triggs | March 2023
"The Asus Zenfone 9 is a compact device that still packs more than enough power under the hood. It's compact size, Bluetooth and audio features (including a headphone jack!), and hardware gestures combine to offer a package that does enough differently to warrant your attention."
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."
Get a great deal on the Asus Zenfone 9 or the OnePlus 9 Pro
About ASUS
Asus is a well-known player in the mobile world, and in the past few years it has been known for covering specific niches in the smartphone market. Their Zenfone line of devices appeal to small phone enthusiasts, by providing very well-rounded and capable phones at a package that is not too large to operate with one hand – something hard to find in modern Android smartphones. Conversely, their ROG line of devices cater to mobile gamers, by providing a slew of hardware and software features, specifically tailored to enhance the mobile gaming experience. Additionally, Asus is one of the only manufacturers left that continues to include headphone jacks in their lineup of phones, a feature that has become exceedingly rare in today's market.
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”.
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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.
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About the phone team
Joe Golden, Ph.D
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Joe is an entrepreneur and lifelong electronics enthusiast with a Ph.D in Economics from the University of Michigan.
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