OnePlus 9 Pro vs Asus Zenfone 8

Here we compared two flagship smartphones: the 6.7-inch OnePlus 9 Pro (with Qualcomm Snapdragon 888) that was released on March 23, 2021, against the Asus Zenfone 8, which is powered by the same chip and came out 2 months after. On this page, you will find tests, full specs, strengths, and weaknesses of each of the gadgets.

Key differences

An overview of the main advantages of each smartphone
Reasons to consider the OnePlus 9 Pro
  • The rear camera has a 3.3x optical zoom
  • Has a 0.8 inch larger screen size
  • Shows 37% longer battery life (31:52 vs 23:13 hours)
  • Supports wireless charging up to 50W
  • Comes with 500 mAh larger battery capacity: 4500 vs 4000 mAh
  • Delivers 9% higher peak brightness (866 against 793 nits)
  • More recent OS version: Android 13 versus 12
  • Thinner bezels – 7.4% more screen real estate
  • 18% higher pixel density (525 vs 446 PPI)
  • Ready for eSIM technology
Reasons to consider the Asus Zenfone 8
  • 22% better performance in AnTuTu Benchmark (837K versus 688K)
  • Slow-motion recording at 480FPS
  • Weighs 28 grams less
  • Better grip in hands – the body is 5.1 mm narrower
  • Includes a 3.5 mm headphone audio jack port
  • The front-facing camera can record video at 4K

Review

Display
Screen quality, color accuracy, brightness
Performance
CPU/GPU performance in apps and games
Battery
Battery life, charging type and speed
Camera
Photo and video recording quality
Connectivity
Networks, ports, data transmission
NanoReview score
Final comparison evaluation

Value for money

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Price

Tests and specifications

Comparison table of technical specifications and tests
Phone:
vs

Display

Type AMOLED Super AMOLED
Size 6.7 inches 5.9 inches
Resolution 1440 x 3216 pixels 1080 x 2400 pixels
Aspect ratio 20:9 20:9
PPI 525 ppi 446 ppi
Refresh rate 120 Hz 120 Hz
Max rated brightness 500 nits 600 nits
Max rated brightness in HDR 1300 nits 1100 nits
HDR support Yes, HDR10+ Yes, HDR10+
Screen protection Corning Gorilla Glass 5 Gorilla Glass Victus
Screen-to-body ratio 90.3% 82.9%
Display features - DCI-P3
- Always-On Display
- DC Dimming
- DCI-P3
- Always-On Display
- DC Dimming
Display tests
RGB color space 97.8% 99.9%
PWM 192 Hz 495 Hz
Response time 41.5 ms 3.2 ms
Contrast ∞ Infinity ∞ Infinity
Peak brightness test (auto)
9 Pro +9%
866 nits
793 nits
Sources: NotebookCheck [3], [4]

Design and build

Height 163.2 mm (6.43 inches) 148 mm (5.83 inches)
Width 73.6 mm (2.9 inches) 68.5 mm (2.7 inches)
Thickness 8.7 mm (0.34 inches) 8.9 mm (0.35 inches)
Weight 197 gramm (6.95 oz) 169 gramm (5.96 oz)
Waterproof IP68 IP68
Rear material Glass Glass
Frame material Metal Metal
Colors White, Black, Green Black, Silver
Fingerprint scanner Yes, in-display Yes, in-display
Screen-to-body ratio
9 Pro +9%
90.3%
82.9%

Performance

Tests of OnePlus 9 Pro and Asus Zenfone 8 in the benchmarks
SoC
Chipset Qualcomm Snapdragon 888 Qualcomm Snapdragon 888
Max. clock 2840 MHz 2840 MHz
CPU cores 8 (1 + 3 + 4) 8 (1 + 3 + 4)
Architecture - 4 cores at 1.8 GHz: Kryo 680 Silver (Cortex-A55)
- 3 cores at 2.42 GHz: Kryo 680 Gold (Cortex-A78)
- 1 core at 2.84 GHz: Kryo 680 Prime (Cortex-X1)
- 4 cores at 1.8 GHz: Kryo 680 Silver (Cortex-A55)
- 3 cores at 2.42 GHz: Kryo 680 Gold (Cortex-A78)
- 1 core at 2.84 GHz: Kryo 680 Prime (Cortex-X1)
L3 cache 4 MB 4 MB
Lithography process 5 nanometers 5 nanometers
Graphics Adreno 660 Adreno 660
GPU clock 840 MHz 840 MHz
FLOPS ~1720 GFLOPS ~1720 GFLOPS
Memory
RAM size 8, 12 GB 6, 8, 12, 16 GB
Memory type LPDDR5 LPDDR5
Memory clock 2750 MHz 3200 MHz
Channels 4 2
Storage
Storage size 128, 256 GB 128, 256 GB
Storage type UFS 3.1 UFS 3.1
Memory card No No

Benchmarks

Geekbench 5 (Single-Core)
9 Pro +1%
1122
1110
Geekbench 5 (Multi-Core)
3611
3596
AnTuTu Benchmark 9
688584
Zenfone 8 +22%
837100
CPU 157992 210328
GPU 287397 314992
Memory 120016 135761
UX 127958 164712
Total score 688584 837100
3DMark Wild Life Performance
9 Pro +1%
5713
5647
Stability 57% 58%
Graphics test 34 FPS 33 FPS
Graphics score 5713 5647
PCMark 3.0 score 11955 15984
AnTuTu 9 Smartphone Scores (152nd and 61st place)
Sources: 3DMark [3], [4]

Software

Operating system Android 11 (Can be upgraded to Android 13) Android 11 (Can be upgraded to Android 12)
ROM OxygenOS 13 ZenUI 8
OS size 16 GB 16 GB

Battery

Specifications
Capacity 4500 mAh 4000 mAh
Charge power 65 W 30 W
Battery type Li-Po Li-Po
Replaceable No No
Wireless charging Yes (50 W) No
Reverse charging Yes, (wireless) Yes
Fast charging Yes (100% in 32 min) Yes, Quick Charge 5 (60% in 30 min)
Full charging time 0:32 hr 1:28 hr
Battery life tests
Web browsing 11:28 hr 06:46 hr
Watching video 12:04 hr 12:35 hr
Gaming 05:10 hr 03:24 hr
Standby 113 hr 77 hr
General battery life
9 Pro +37%
31:52 hr
23:13 hr

Camera

Specs and camera test of smartphones
Main camera
Matrix 48 megapixels 64 megapixels
Image resolution 8000 x 6000 9000 x 7000
Zoom Optical, 3.3x Digital
Flash Dual LED Dual LED
Stabilization Optical Optical
8K video recording Up to 30FPS Up to 24FPS
4K video recording Up to 120FPS Up to 60FPS
1080p video recording Up to 60FPS Up to 60FPS
Slow motion 240 FPS (1080p) 480 FPS (720p)
Angle of widest lens 140° 112°
Lenses 4 (48 MP + 8 MP + 50 MP + 2 MP) 2 (64 MP + 12 MP)
Wide (main) lens - 48 MP
- Aperture: f/1.8
- Focal length: 23 mm
- Pixel size: 1.12 micron
- Sensor: 1/1.43", Sony IMX789 (Exmor-RS CMOS)
- Laser autofocus
- Optical stabilization
- 64 MP
- Aperture: f/1.8
- Focal length: 26 mm
- Pixel size: 0.8 micron
- Sensor: 1/1.7", Sony IMX686 (Exmor-RS CMOS)
- Phase autofocus (Dual Pixel)
- Optical stabilization
Telephoto lens - 8 MP
- Aperture: f/2.4
- Focal length: 77 mm
- Pixel size: 1 micron
- Sensor: 1/4.4", Omnivision OV08A10
- Phase autofocus
- Optical stabilization
-
Ultra-wide lens - 50 MP
- Aperture: f/1.8
- Focal length: 14 mm
- Pixel size: 1 micron
- Sensor: 1/1.56", Sony IMX766 (Exmor-RS CMOS)
- Phase autofocus
- 12 MP
- Aperture: f/2.2
- Focal length: 14 mm
- Pixel size: 1.4 micron
- Sensor: 1/2.55", Sony IMX363 (Exmor-RS CMOS)
- Phase autofocus (Dual Pixel)
Depth lens - 2 MP
- Aperture: f/2.4
-
Camera features - Bokeh mode
- Pro mode
- RAW support
- Bokeh mode
- Pro mode
Samples Photo samples of OnePlus 9 Pro from DxOMark Photo samples of Asus Zenfone 8 from DxOMark
Selfie camera
Megapixels 16 megapixels 12 megapixels
Image resolution 4920 x 3264 4290 x 2800
Aperture f/2.0 f/2.5
Focal length - 28 mm
Pixel size 1 microns 1.22 microns
Sensor type Exmor-RS CMOS Exmor-RS CMOS
Sensor size 1/3.06" 1/2.93"
Video resolution 1080p (Full HD) at 30 FPS 2160p (4K) at 30 FPS

DxOMark camera tests

Photo quality
9 Pro +2%
129
126
Video quality
108
108
Generic camera score
9 Pro +3%
124
120

Connectivity

Wi-Fi standard Wi-Fi 6 (802.11 a/b/g/n/ac/ax) Wi-Fi 6E (802.11 a/b/g/n/ac/ax)
Wi-Fi features - Dual Band
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
- Dual Band
- Wi-Fi MiMO
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
Bluetooth version 5.2 5.2
Bluetooth features LE, A2DP LE, A2DP
USB type USB Type-C USB Type-C
USB version 3.1 3.1
USB features - Charging
- USB-Storage mode
- OTG
- Charging
- USB-Storage mode
- OTG
GPS GPS, GLONASS, Beidou, Galileo, SBAS GPS, GLONASS, Beidou, Galileo, QZSS, NAVIC
NFC* Yes Yes
Infrared port No No
Network
Number of SIM* 2 2
Type of SIM card Nano Nano
Multi SIM mode Standby Standby
eSIM support* Yes No
Hybrid slot No No
LTE Cat* 24 20
5G support Yes Yes

Sound

Speakers Stereo Stereo
Headphone audio jack No Yes
FM radio No No
Dolby Atmos Yes Yes
Speakers test
Max. loudness
81.1 dB
Zenfone 8 +7%
86.7 dB

Other

Category Flagship Flagship
Announced March 2021 May 2021
Release date March 2021 May 2021
SAR (head) 0.99 W/kg -
SAR (body) 1.21 W/kg -
Sensors - Barometer
- Proximity sensor
- Gyroscope
- Accelerometer
- Ambient light sensor
- Compass
- Fingerprint
- Hall-effect sensor
- Proximity sensor
- Gyroscope
- Accelerometer
- Ambient light sensor
- Compass
- Fingerprint
*Disclaimer! NFC, GSM network support, and some other specs can be different depending on the country.

Conclusion

If the software, battery life, camera, connectivity, and design are more important to you, then choose the OnePlus 9 Pro. But if the performance and sound are more of a priority – go for the Asus Zenfone 8.

Cast your vote

So, which phone would you choose?
29 (46%)
34 (54%)
Total votes: 63

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