Xiaomi Poco M3 vs OnePlus 9 - Detailed Phone Comparison

Detailed Comparison

Specification
OnePlus 9
OnePlus 9
Oneplus

General

Launch Date November 27, 2020 March 26, 2021
Release Year 2020 2021

Physical

Volume 120.44 cm³ 103.29 cm³
Screen Size to Weight Ratio 3.3 "/g 3.41 "/g
Weight 198 g 192 g
Height 162.3 mm 160 mm
Width 77.3 mm 74.2 mm
Thickness 9.6 mm 8.7 mm
Foldable Design No No
Available Colors
  • Cool Blue
  • Poco Yellow
  • Power Black
  • Winter Mist
  • Arctic Sky
  • Astral Black

Display

Screen Size 6.53 " 6.55 "
Resolution 1080 x 2340 1080 x 2400
Aspect Ratio 19.5:9 20:9
Screen-to-Body Ratio 83.4 % 87.2 %
Pixel Density 395 PPI 402 PPI
Refresh Rate N/A 120 Hz
Typical Brightness 400 nits N/A
HBM Brightness N/A N/A
Peak Brightness N/A 1100 nits

Hardware

Battery Capacity per Screen Area 140.71 mAh/in² 104.89 mAh/in²
Battery Density 49.82 mAh/cm³ 43.57 mAh/cm³
Battery Capacity 6000 mAh 4500 mAh
NFC Support No Yes
Chipset Qualcomm SM6115 Snapdragon 662 (11 nm) Qualcomm SM8350 Snapdragon 888 5G (5 nm)
CPU Octa-core (4x2.0 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver) Octa-core (1x2.84 GHz Cortex-X1 & 3x2.42 GHz Cortex-A78 & 4x1.80 GHz Cortex-A55)
GPU Adreno 610 Adreno 660

Connectivity

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

Software

Operating System Android Android
Initial OS Version 10 11
Maximum OS Version 13

Comparison Summary

1. Specifications Comparison

FeatureXiaomi Poco M3OnePlus 9Practical Impact
Design
Dimensions162.3 x 77.3 x 9.6 mm160 x 74.2 x 8.7 mmPoco M3 is larger and thicker, may feel bulkier; OnePlus 9 is more compact and sleek.
Weight198g192gOnePlus 9 is slightly lighter, potentially more comfortable for extended use.
Display
Size6.53"6.55"Negligible difference in size, both offer similar screen real estate.
Resolution1080x23401080x2400Very similar sharpness, differences unlikely noticeable.
Pixel Density395 PPI402 PPIEssentially the same sharpness, negligible practical difference.
TechnologyIPS LCDAMOLEDOnePlus 9 has much better contrast, deeper blacks, and more vibrant colors. Superior for media consumption.
Refresh Rate60Hz120HzOnePlus 9 offers smoother scrolling, animations and overall experience, especially in gaming and fast-paced apps.
Brightness0 nits1100 nitsOnePlus 9 is much brighter, with far better outdoor visibility in sunlight.
Performance
ChipsetSnapdragon 662 (11nm)Snapdragon 888 5G (5nm)OnePlus 9 is significantly faster for all tasks, offering much better gaming, app loading and multitasking experience.
AnTuTu Score185,028880,900OnePlus 9 has vastly superior performance, showing it's far more capable.
GPUAdreno 610Adreno 660OnePlus 9 has a much more powerful GPU, leading to better graphics performance in games.
Battery
Capacity6000mAh4500mAhXiaomi Poco M3 has a significantly larger battery, potentially offering longer battery life.
Charging18W Fast Charging65W Fast ChargingOnePlus 9 charges much faster, reducing time spent plugged in.
FeaturesReverse Charging, 22.5W Charger in-box15W Wireless ChargingPoco M3 can charge other devices, OnePlus 9 offers wireless charging.
Camera
Main Camera48MP f/1.79, 1/2" sensor48MP f/1.79, 1/1.4" sensorOnePlus 9 has a larger sensor, resulting in better low-light performance, more detail, and higher quality overall images.
Selfie Camera8MP f/2.0, 1/4" sensor16MP f/2.4, 1/3.13" sensorOnePlus 9 captures higher resolution selfies with more detail.
Wide Angle LensN/A50MP f/2.2, 1/1.56" sensorOnePlus 9 offers more versatile photography with an ultra-wide lens.
B&W CameraN/A2MP f/2.4OnePlus 9 provides additional artistic options with a dedicated B&W sensor.
Video1080p@30fpsUp to 8K@30fps, 4K@60fpsOnePlus 9 offers much higher quality video with 8k support and higher frame rates for smoother recordings.
DxOMarkNot AvailableNot AvailableNo data available to compare camera performance from a trusted source
FeaturesBasic camera featuresAdvanced features, 4K, 8K, PDAF, Night ModeOnePlus 9 provides more advanced camera features, including high-resolution recording and night mode.
Software
OSAndroid 10Android 11, upgradable to 13OnePlus 9 is on a newer Android version and has received major updates, which means more features, better security, and better performance.
Connectivity
WiFiWi-Fi 5 (802.11ac)Wi-Fi 6 (802.11ax)OnePlus 9 supports faster Wi-Fi speeds, lower latency, and better performance in crowded networks.
Bluetooth5.05.2OnePlus 9 offers improved Bluetooth stability, efficiency, and audio codec support.
GPSBasic GPS supportAdvanced GPS supportOnePlus 9 offers more accurate positioning thanks to more satellite support.
SIMDual SIM, Dual StandbyDual SIM, Dual StandbyBoth offer the same SIM functionality.
Storage
Internal64 GB or 128 GB128 GB or 256 GBOnePlus 9 offers more internal storage for apps, files, and media.
RAM4 GB or 6 GB8 GB or 12 GBOnePlus 9 offers more RAM, allowing for better multitasking and smoother app performance.
ExpandableNoNoNeither phone allows for storage expansion via microSD cards.
Audio
QualityHi-Res Audio, Stereo SpeakersDolby Atmos, Noise Cancellation Mic, Stereo Speakers, 3 micsOnePlus 9 has more advanced audio with better immersion and voice clarity. Poco M3 offers High-Res.
Security
FeaturesSide-mounted fingerprint sensorBasic fingerprint sensorXiaomi Poco M3 features a side-mounted sensor which some users find more convenient.
Build Quality
ProtectionGorilla Glass 3Gorilla Glass 5OnePlus 9 has better screen protection.
SensorsFingerprint, Accelerometer, Compass, Ultrasonic Proximity VirtualFingerprint, Accelerometer, Compass, Gyroscope, ProximityOnePlus 9 provides a more comprehensive suite of sensors for advanced functionalities, gaming, and VR.

2. Key Differences Analysis

Xiaomi Poco M3 Advantages:

  • Significantly Larger Battery: Offers potentially longer battery life, ideal for users who need their phone to last all day.
  • Reverse Charging: Can act as a power bank for other devices.
  • Side-mounted fingerprint sensor: Some users may prefer this for ease of access.
  • Lower Cost: This is a significant advantage for budget-conscious buyers.

Practical Implications: The Poco M3 is aimed at those who prioritize battery life and affordability over raw performance or cutting-edge features. It's a good option for basic everyday tasks, media consumption, and extended use without needing to charge frequently.

OnePlus 9 Advantages:

  • Superior Display: AMOLED panel offers better colors, contrast, and brightness, making it great for media consumption. 120Hz refresh rate provides much smoother scrolling.
  • Much Faster Performance: The Snapdragon 888 is a flagship processor that delivers significantly better app performance, multitasking, and gaming capabilities.
  • Advanced Camera System: Larger main sensor, wide-angle lens, higher resolution selfie camera, and 8k video recording capabilities result in far better overall camera performance.
  • Faster Charging: 65W fast charging drastically reduces charge times.
  • Better Connectivity: Supports newer WiFi and Bluetooth standards.
  • Up-to-Date Software: Newer Android versions and software updates.

Practical Implications: The OnePlus 9 is designed for users who want a high-end experience with superior performance, a great display, and a versatile camera system. It's suitable for demanding users, gamers, photographers, and those who consume a lot of media.

Trade-offs:

  • The Xiaomi Poco M3 sacrifices performance, display quality, and camera features for a larger battery and a lower price.
  • The OnePlus 9 sacrifices battery capacity for higher performance, a better display, and a superior camera system. It also costs considerably more.

3. User Profiles & Recommendations

Xiaomi Poco M3 Ideal User:

  • Budget-conscious users who prioritize battery life above all else.
  • Users who primarily use their phone for basic tasks like browsing, social media, and calling.
  • Users who prefer a larger phone with a longer battery life and don't need top-tier performance or camera capabilities.
  • Users who might find reverse charging helpful in their daily routine.

Use Cases:

  • Long trips or extended days without easy access to charging.
  • Secondary phone for work or entertainment purposes, emphasizing cost savings.
  • Users who need a reliable phone that gets them through the day without issues.

OnePlus 9 Ideal User:

  • Users who want top-tier performance and a premium user experience.
  • Gamers, photographers, and media enthusiasts.
  • Users who value a high-quality display, fast charging, and a versatile camera system.
  • Those who value having the latest software and performance.

Use Cases:

  • High-intensity gaming or graphic intensive applications.
  • Capturing high-quality photos and videos.
  • Users who stream a lot of media content on their phones.
  • Daily power users who engage in heavy multitasking and productivity.

Price-to-Value Ratio:

  • The Xiaomi Poco M3 offers a great value for budget users who prioritize battery life.
  • The OnePlus 9 provides premium features and performance at a higher cost.

4. Decision Framework

Key Questions:

  1. What is your budget? The Poco M3 is significantly cheaper, but you lose a lot of high-end features.
  2. How important is battery life to you? The Poco M3 prioritizes this aspect significantly over other features.
  3. How important is performance, display quality, and camera? OnePlus 9 excels in these areas, providing a top-tier experience.

Scenario-Based Recommendations:

  • Scenario 1 (Budget User): If you have a strict budget and need a reliable phone for basic tasks and don't need the best camera quality, the Xiaomi Poco M3 is the better choice.
  • Scenario 2 (Performance & Media Enthusiast): If you want top-tier performance, a great display, a good camera, and fast charging, then the OnePlus 9 is the way to go, even with the higher price.
  • Scenario 3 (Balanced User): If you are somewhere in the middle, you need to weigh your priorities. Are you willing to sacrifice performance and camera for longer battery life, or vice versa? If the display is important but you don't need top of the line performance or camera, you might look for a mid-range phone with an AMOLED display as an alternative

What I would Choose

Given the information, I would choose the OnePlus 9.

My rationale is based on a few key factors:

  1. Performance: As someone who uses my phone for a variety of tasks, including multitasking, moderate gaming, and photo editing, the dramatically superior performance of the Snapdragon 888 in the OnePlus 9 is a significant advantage. The Poco M3's performance would feel noticeably slower and less responsive.
  2. Display: The AMOLED display with a 120Hz refresh rate on the OnePlus 9 provides a far more enjoyable viewing experience compared to the IPS LCD panel on the Poco M3. The better colors, deeper blacks, and smoother scrolling make a noticeable difference in daily use, especially for watching videos and browsing.
  3. Camera Quality: I value good camera quality for capturing photos and videos, and the larger sensor, wide angle lens, and advanced features in the OnePlus 9 offer a much more versatile and higher-quality experience. The ability to record up to 8k is also very compelling.
  4. Software: Having a newer version of android and receiving updates in the future is important for security and new features.

While I acknowledge that the Poco M3 has excellent battery life and is more affordable, those advantages don't outweigh the benefits of the higher quality display, faster performance, advanced camera and newer software. I am willing to charge my phone more frequently to get a far superior user experience.

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.

Key Strengths:

  • Mobile technology analysis
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Bridging technical complexity with engaging, accessible narratives.