OnePlus 9 vs Xiaomi Poco X4 GT - Detailed Phone Comparison

Detailed Comparison

Specification
OnePlus 9
OnePlus 9
Oneplus

General

Launch Date March 26, 2021 June 27, 2022
Release Year 2021 2022

Physical

Volume 103.29 cm³ 108.18 cm³
Screen Size to Weight Ratio 3.41 "/g 3.3 "/g
Weight 192 g 200 g
Height 160 mm 163.6 mm
Width 74.2 mm 74.3 mm
Thickness 8.7 mm 8.9 mm
Foldable Design No No
Available Colors
  • Winter Mist
  • Arctic Sky
  • Astral Black
  • Silver
  • Black
  • Blue

Display

Screen Size 6.55 " 6.6 "
Resolution 1080 x 2400 1080 x 2460
Aspect Ratio 20:9 21:9
Screen-to-Body Ratio 87.2 % 85.1 %
Pixel Density 402 PPI 407 PPI
Refresh Rate 120 Hz 144 Hz
Typical Brightness N/A 500 nits
HBM Brightness N/A 650 nits
Peak Brightness 1100 nits N/A

Hardware

Battery Capacity per Screen Area 104.89 mAh/in² 116.62 mAh/in²
Battery Density 43.57 mAh/cm³ 46.96 mAh/cm³
Battery Capacity 4500 mAh 5080 mAh
NFC Support Yes Yes
Chipset Qualcomm SM8350 Snapdragon 888 5G (5 nm) Mediatek Dimensity 8100 (5 nm)
CPU Octa-core (1x2.84 GHz Cortex-X1 & 3x2.42 GHz Cortex-A78 & 4x1.80 GHz Cortex-A55) Octa-core (4x2.85 GHz Cortex-A78 & 4x2.0 GHz Cortex-A55)
GPU Adreno 660 Mali-G610 MC6

Connectivity

USB Version 3.1 2.0
OTG Support 1 1
DisplayPort
DisplayPort Version N/A N/A
USB Features USB Type-C 3.1, OTG USB Type-C 2.0, OTG

Software

Operating System Android Android
Initial OS Version 11 12
Maximum OS Version 13

Comparison Summary

Smartphone Comparison: OnePlus 9 vs. Xiaomi Poco X4 GT

1. Specifications Comparison

FeatureOnePlus 9Xiaomi Poco X4 GTPractical Impact
Design
Dimensions160 × 74.2 × 8.7 mm163.6 × 74.3 × 8.9 mmSlightly taller and thicker device in Xiaomi Poco X4 GT, noticeable in hand feel for some users.
Weight192g200gOnePlus 9 is slightly lighter, which might be preferable for extended use
Display
Size6.55"6.6"Negligible difference in screen size; both offer an immersive experience.
Resolution1080x24001080x2460Practically identical sharpness; minor difference not noticeable to the human eye.
Pixel Density (PPI)402407Similar sharpness; negligible visual difference.
TechnologyAMOLEDIPS LCDOnePlus 9 has superior contrast, deeper blacks, and more vibrant colors; better for media consumption and dark mode usage.
Refresh Rate120Hz144HzXiaomi Poco X4 GT offers slightly smoother scrolling and animations, beneficial for gaming.
Brightness1100 nits0 nitsOnePlus 9 is much better for outdoor use in bright sunlight due to higher peak brightness. Xiaomi's brightness is missing.
Performance
ChipsetSnapdragon 888 5GDimensity 8100Different chips, both offer high performance, but the Snapdragon 888 has a slight edge in benchmarks.
AnTuTu Score880,900820,061OnePlus 9 has a slightly higher benchmark score, indicating potentially smoother performance in demanding tasks.
GPUAdreno 660Mali-G610 MC6Different GPU architectures; Adreno 660 is slightly stronger.
Battery
Capacity4500mAh5080mAhXiaomi Poco X4 GT likely offers longer battery life per charge, better for users away from charging points.
Charging65W fast charging67W fast chargingBoth fast charge, with practically negligible difference; fast charging means less time plugged in.
Charging Features15W Wireless ChargingNoneOnePlus 9 has the added convenience of wireless charging.
Camera
Main Camera48MP, f/1.79, 1/1.4"64MP, f/1.89, 1/1.72"OnePlus 9's larger sensor and wider aperture should allow for better low-light performance and shallower depth of field.
Selfie Camera16MP, f/2.4, 1/3.13"16MP, f/2.45, 1/3.06"Very similar selfie cameras, with slight differences in sensor size and aperture.
Wide Angle50MP, f/2.2, 1/1.56"8MP, f/2.2OnePlus 9 has a much higher-resolution ultra-wide camera for more detailed photos.
Macro LensNone2MP, f/2.4, 1/5"Xiaomi Poco X4 GT has a dedicated macro lens for close-up shots, while OnePlus 9 lacks this feature.
Black & White Lens2MP, f/2.4NoneOnePlus 9 has a dedicated monochrome sensor that enhances B&W photos.
Video8K@30fps, 4K@60fps, EIS4K@30fps, EISOnePlus 9 supports higher resolution 8K video recording, beneficial for professional use.
Software
Operating SystemAndroid 11 (upgradable to 13)Android 12Xiaomi Poco X4 GT has a slightly newer base OS version out of the box; both will receive updates.
Connectivity
WiFiWi-Fi 6Wi-Fi 6Both offer similar modern WiFi capabilities.
BluetoothBluetooth 5.2Bluetooth 5.3Xiaomi Poco X4 GT has a newer Bluetooth version, potentially offering more efficient connections.
Storage
Internal128 GB or 256 GB128 GB or 256 GBBoth offer similar storage options with no expansion available.
RAM8GB or 12 GB8 GBOnePlus 9 (12GB variant) can handle more demanding tasks and multitasking better.
Audio
Audio QualityDolby Atmos, 3 mics, Noise CancellationDolby Atmos, Hi-Res Audio, 2 micsOnePlus 9 has a slight advantage with better audio quality for voice calls, and Xiaomi for music lovers.
Security
Fingerprintbasic fingerprint sensorside-mounted fingerprint sensorXiaomi Poco X4 GT has a faster and more convenient fingerprint sensor location.

2. Key Differences Analysis

OnePlus 9 Advantages:

  • Superior Display: AMOLED technology provides much better contrast, deeper blacks, and more vibrant colors compared to the Xiaomi Poco X4 GT's LCD screen, resulting in a superior viewing experience, especially for media consumption.
  • Higher Brightness: 1100 nits peak brightness makes the screen significantly more viewable outdoors under bright sunlight.
  • Better Main Camera: Larger sensor, wider aperture, and better low-light performance for main camera.
  • Superior Ultra-Wide Camera: The 50MP ultra-wide camera provides much more detailed images than the 8MP on the Xiaomi.
  • 8K Video Recording: Higher resolution video recording for professional use.
  • Wireless Charging: Added convenience of wireless charging.
  • More RAM (12GB option): Better multitasking and performance with the 12GB RAM variant.
  • Slightly Better Performance: Marginal performance gain based on benchmark scores.
  • Advanced Audio: Offers better spatial audio, voice capture and clearer calls with Noise cancellation microphone and 3 microphones.

Xiaomi Poco X4 GT Advantages:

  • Newer Release: Newer phone with a more modern design and slightly more up-to-date software version at launch.
  • Smoother Refresh Rate: 144Hz refresh rate provides slightly smoother scrolling and animations, beneficial for gaming.
  • Larger Battery: The 5080mAh battery offers better battery life, a significant advantage for users who don't want to charge frequently.
  • Faster Charging: A slightly faster 67W charging speed reduces the time spent plugged in.
  • Side-Mounted Fingerprint: Faster and more ergonomically convenient side-mounted fingerprint sensor.
  • Dedicated Macro Lens: Offers a dedicated macro camera for close-up photography.
  • Hi-Res Audio: Better audio for audiophiles
  • Newer Bluetooth: More efficient Bluetooth connectivity

Trade-offs:

  • OnePlus 9 sacrifices battery life and a dedicated macro lens for a superior display, camera and wireless charging.
  • Xiaomi Poco X4 GT sacrifices display quality, brightness, ultra-wide camera, 8K recording, wireless charging and advanced audio for a larger battery, slightly faster charging, a macro lens and a smoother display.

3. User Profiles & Recommendations

OnePlus 9 Ideal Users:

  • Media Enthusiasts: Those who prioritize excellent display quality for watching videos and consuming content (Netflix, Youtube, Gaming).
  • Photography Lovers: Users who value camera quality, especially low-light performance and high-resolution wide angle photos and video recordings.
  • Power Users: Users who need the added performance and multi-tasking of 12 GB RAM.
  • Users who prefer Wireless Charging Those who value convenience of wireless charging.

Specific Use Cases for OnePlus 9:

  • Watching movies and shows on the go.
  • Capturing high-quality photos and videos in varied conditions.
  • High performance gaming, multitasking, and demanding applications.
  • Making the most of available connectivity (Wifi and BT).

Xiaomi Poco X4 GT Ideal Users:

  • Gamers: Those who prioritize a higher refresh rate for smoother gameplay and better battery life.
  • Users on the Go: Individuals who need a longer battery life to last throughout the day.
  • Budget-Conscious Buyers: Users who want to maximize battery and performance while sacrificing some camera and display features, value oriented.
  • Practical Users: Those who don't require top-tier display quality and are ok with trade-offs on camera quality to gain battery life.

Specific Use Cases for Xiaomi Poco X4 GT:

  • Playing mobile games for extended periods of time.
  • Traveling or using the phone for long periods away from charging.
  • Macro photography enthusiasts who enjoy taking photos of small objects.

4. Decision Framework

Key Questions for Buyers:

  1. Display Quality vs. Battery Life: Do you prioritize a vibrant, high-contrast display (OnePlus 9) or extended battery life (Xiaomi Poco X4 GT)?
  2. Camera Quality: Is superior camera performance and 8K video recording necessary (OnePlus 9), or is a good main camera with a macro lens sufficient (Xiaomi Poco X4 GT)?
  3. Wireless Charging and Audio Quality: Is the convenience of wireless charging and advanced audio important for you (OnePlus 9), or is it a non-essential feature?

Scenario-Based Recommendations:

  • Scenario 1: Media Consumption & Photography: If you watch a lot of videos and enjoy taking high-quality photos, the OnePlus 9 is the better choice.
  • Scenario 2: Gaming and Extended Use: If you prioritize gaming with long battery sessions, the Xiaomi Poco X4 GT is a better fit.
  • Scenario 3: Budget Conscious: If you are looking for a good combination of performance and features on a budget with a good battery life, Xiaomi Poco X4 GT is the best option.

My Choice

If I had to choose, I would go with the OnePlus 9. While the larger battery of the Xiaomi Poco X4 GT is very appealing, I personally value display quality more. The superior AMOLED display on the OnePlus 9 would make my daily media consumption much more enjoyable. I also like to take high quality photos and videos, and the OnePlus 9's much better ultra-wide and main cameras, along with its 8K video recording capabilities are very compelling. The slightly better performance and wireless charging are also attractive features for my use case. While the battery life may be slightly less than the Xiaomi, I am ok with a slightly lower battery capacity in exchange for a better display and camera quality.

Emily Harper
Emily Harper

Technology Insights Specialist

Dedicated technology writer specializing in mobile device analysis and technology communication. Expert at translating complex smartphone features into clear, actionable insights for diverse audiences.

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Bridging technical complexity with engaging, accessible narratives.