OnePlus 9 vs Xiaomi Poco M4 5G - Detailed Phone Comparison

Detailed Comparison

Specification
OnePlus 9
OnePlus 9
Oneplus

General

Launch Date March 26, 2021 October 7, 2022
Release Year 2021 2022

Physical

Volume 103.29 cm³ 111.08 cm³
Screen Size to Weight Ratio 3.41 "/g 3.29 "/g
Weight 192 g 200 g
Height 160 mm 164 mm
Width 74.2 mm 76.1 mm
Thickness 8.7 mm 8.9 mm
Foldable Design No No
Available Colors
  • Winter Mist
  • Arctic Sky
  • Astral Black
  • Cool Blue
  • Poco Yellow
  • Power Black

Display

Screen Size 6.55 " 6.58 "
Resolution 1080 x 2400 1080 x 2408
Aspect Ratio 20:9 20:9
Screen-to-Body Ratio 87.2 % 83.6 %
Pixel Density 402 PPI 401 PPI
Refresh Rate 120 Hz 90 Hz
Typical Brightness N/A N/A
HBM Brightness N/A 500 nits
Peak Brightness 1100 nits N/A

Hardware

Battery Capacity per Screen Area 104.89 mAh/in² 115.48 mAh/in²
Battery Density 43.57 mAh/cm³ 45.01 mAh/cm³
Battery Capacity 4500 mAh 5000 mAh
NFC Support Yes Yes
Chipset Qualcomm SM8350 Snapdragon 888 5G (5 nm) Mediatek Dimensity 700 (7 nm)
CPU Octa-core (1x2.84 GHz Cortex-X1 & 3x2.42 GHz Cortex-A78 & 4x1.80 GHz Cortex-A55) Octa-core (2x2.2 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55)
GPU Adreno 660 Mali-G57 MC2

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 M4 5G

1. Specifications Comparison

FeatureOnePlus 9Xiaomi Poco M4 5GPractical Impact
Design
Dimensions160 × 74.2 × 8.7 mm164 × 76.1 × 8.9 mmPoco M4 5G is slightly larger and thicker; may feel less ergonomic for one-handed use.
Weight192g200gOnePlus 9 is lighter, potentially more comfortable for prolonged use.
Display
Size6.55"6.58"Negligible size difference; both offer a large screen experience.
Resolution1080x24001080x2408Both provide similar sharpness; no visible difference for most users.
PPI402401Virtually identical pixel density; both displays will appear crisp.
TechnologyAMOLEDIPS LCDOnePlus 9 offers superior contrast, vibrant colors, deeper blacks, and better power efficiency, especially with dark mode.
Refresh Rate120Hz90HzOnePlus 9 provides smoother animations and scrolling, enhancing user experience, especially during fast-paced games and navigation.
Brightness1100 nits0 nitsOnePlus 9 offers significantly better visibility in bright sunlight. Xiaomi Poco M4 5G has no brightness specified which means it is either not specified or is very low.
Performance
ChipsetQualcomm SM8350 Snapdragon 888 5G (5 nm)Mediatek Dimensity 700 (7 nm)OnePlus 9 offers significantly faster app loading, better multitasking, and smoother gaming performance.
AnTuTu Score880,900381,300OnePlus 9 has far superior performance, suitable for demanding tasks and high-end gaming.
GPUAdreno 660Mali-G57 MC2OnePlus 9's GPU provides superior graphics performance for gaming and demanding applications.
Camera
Main Camera48MP, f/1.79, 1/1.4" Sony IMX68913MP, f/2.2OnePlus 9 captures significantly more detail, performs better in low light, and has a wider aperture for better shallow depth of field effects.
Selfie Camera16MP, f/2.4, 1/3.13" Sony IMX4715MP, f/2.2OnePlus 9 captures more detailed selfies and performs better in low light. Xiaomi Poco M4 5G has slightly wider aperture which may help in low light.
Wide Angle Lens50MP, f/2.2, 1/1.56" Sony IMX766NoneOnePlus 9 allows for a wider field of view for more immersive landscape and group shots.
Portrait Mode (depth)None2MP, f/2.4Xiaomi Poco M4 5G has a dedicated depth sensor for better bokeh in portraits, but not specified quality.
Black & White Lens2MP, f/2.4NoneOnePlus 9 has a dedicated B&W sensor for artistic monochrome photography.
VideoUp to 8K@30fps, 4K@60fps, HDR, EIS1080p@30fpsOnePlus 9 captures much higher resolution video, more detail and better stabilization.
Battery
Capacity4500mAh5000mAhPoco M4 5G has a slightly larger battery which will likely translate to longer usage time, especially for less intensive tasks.
Charging65W Fast Charging, 15W Wireless18W Fast ChargingOnePlus 9 charges significantly faster, reducing charging time and increasing convenience.
Features15W Wireless ChargingReverse ChargingOnePlus 9 offers wireless charging for convenience. Xiaomi Poco M4 5G can charge other devices.
Software
OSAndroid 11 (upgradable to 13)Android 12Xiaomi Poco M4 5G has a more recent OS out of the box, though OnePlus 9 can be upgraded.
Connectivity
Wi-FiWi-Fi 6 (802.11ax)802.11acOnePlus 9 supports newer Wi-Fi standards for faster speeds and better performance.
Bluetooth5.25.1OnePlus 9 has a newer Bluetooth version, likely with slightly better range and efficiency, and more audio codec options.
GPSAdvanced systemsBasic GPSOnePlus 9 offers more precise location tracking, especially in challenging environments.
Storage & Memory
Internal Storage128/256GB64/128GBOnePlus 9 offers greater storage capacity.
RAM8/12GB4/6GBOnePlus 9 offers significantly more RAM, enabling smoother multitasking and better app performance.
Expandable StorageNoNoNeither phone offers expandable storage.
Audio
QualityDolby Atmos, Stereo Speakers, Noise cancellationBasic audio featuresOnePlus 9 provides more immersive and higher-quality audio experience, including better call quality.
Security
FeaturesBasic fingerprint sensorSide-mounted fingerprint sensorXiaomi Poco M4 5G has a more convenient fingerprint sensor.
Build Quality
Screen ProtectionCorning Gorilla Glass 5Corning Gorilla Glass 3OnePlus 9 has a more durable screen for better protection against scratches and cracks.

2. Key Differences Analysis

OnePlus 9 Advantages:

  • Superior Display: AMOLED screen with 120Hz refresh rate offers significantly better visuals with higher contrast, smoother scrolling, and better sunlight visibility.
  • Significantly Higher Performance: Snapdragon 888 chipset provides much faster processing, making it suitable for demanding tasks, gaming, and heavy multitasking.
  • Better Camera System: Higher resolution sensors, wider apertures, and more lens options result in significantly improved photo and video quality, particularly in low-light conditions.
  • Faster Charging: 65W fast charging allows for very quick battery top-ups.
  • Enhanced Audio: Dolby Atmos and stereo speakers provide a more immersive and high-quality audio experience.
  • More RAM and Storage Options: Available with more RAM and storage which enables better multitasking and more space to store content.
  • Better Connectivity: Newer Wi-Fi and Bluetooth standards for faster, more reliable connections.
  • More Precise Location Tracking: More satellite systems for better location accuracy, especially in urban areas or dense environments.
  • Better Screen Protection: Corning Gorilla Glass 5 provides better screen protection.

Practical Implications of OnePlus 9 Advantages:

  • A user will experience a far smoother and more responsive user interface, including more vivid and better display.
  • The camera capabilities translate to better quality photos and videos in all conditions, especially low light.
  • The fast charging will significantly reduce time spent waiting for the phone to charge.
  • The better audio experience enhances music, movies, and gaming.
  • The faster performance will be noticeable in all usage, and particularly with gaming and heavy multitasking.

Xiaomi Poco M4 5G Advantages:

  • Larger Battery: 500mAh larger battery which may translate to longer battery life.
  • Reverse Charging: Can act as a power bank to charge other devices, making it helpful when others need power.
  • Side-mounted Fingerprint Sensor: Side-mounted fingerprint sensor is often seen as more convenient.
  • More Recent OS out of the box: It has a slightly more recent version of Android.

Practical Implications of Xiaomi Poco M4 5G Advantages:

  • Potentially longer battery life for users who prioritize longevity over performance.
  • Reverse charging can be useful in certain situations.
  • The side mounted finger print sensor might be more convenient to unlock the phone.

Trade-offs:

  • OnePlus 9: Higher price point; slightly smaller battery.
  • Xiaomi Poco M4 5G: Significantly lower performance, inferior display and camera quality; slower charging; less advanced audio.

3. User Profiles & Recommendations

OnePlus 9:

  • Ideal User: Power users, gamers, photography enthusiasts, and those who prioritize performance and a premium experience.
  • Use Cases:
    • High-end mobile gaming
    • Professional-quality photo and video capture
    • Heavy multitasking and demanding applications
    • Multimedia consumption
    • Users who need excellent outdoor visibility
    • Users who do not need a very long battery life, but need fast charging

Xiaomi Poco M4 5G:

  • Ideal User: Budget-conscious users, casual smartphone users, and those who prioritize battery life over performance.
  • Use Cases:
    • Everyday tasks like browsing, social media, and messaging
    • Basic photography
    • Users who need long battery life
    • Users that might need to use their phone to charge others
    • Users that do not need high performance

Price-to-Value Ratio:

  • OnePlus 9: Higher initial cost but offers significant value in performance, display quality, and camera capabilities.
  • Xiaomi Poco M4 5G: Lower cost, but performance is a significant tradeoff.

4. Decision Framework

Key Questions for Buyers:

  1. What is my budget? The OnePlus 9 is more expensive, while the Xiaomi Poco M4 5G is budget-friendly.
  2. How important are performance, display quality and camera capabilities to me? If those are a high priority, the OnePlus 9 is clearly the better choice.
  3. Do I need a very long battery life or do I prioritize fast charging? The Xiaomi Poco M4 5G has a slightly larger battery, but the OnePlus 9 has much faster charging.

Scenario-Based Recommendations:

  • Scenario 1: Power User/Gamer: Choose the OnePlus 9 for its high performance, excellent display, and premium features.
  • Scenario 2: Casual User/Budget Shopper: Choose the Xiaomi Poco M4 5G for its affordability and longer battery life for basic tasks.
  • Scenario 3: Photography Enthusiast: Choose the OnePlus 9 for its superior camera system and video capabilities.
  • Scenario 4: Long Battery Life User: Choose the Xiaomi Poco M4 5G for the slightly larger battery size and reverse charging, but be aware of the performance limitations.

What I Would Choose and Why

If I were choosing between these two phones, I would pick the OnePlus 9. While the Xiaomi Poco M4 5G offers a larger battery and a lower price point, the OnePlus 9's advantages in display quality, performance, and camera capabilities are far more compelling for my needs and preferences.

Here's why:

  1. Display Quality: The AMOLED display with a 120Hz refresh rate on the OnePlus 9 is a significant upgrade over the IPS LCD on the Xiaomi. The better colors, contrast, and smoother refresh rate make the overall user experience far more enjoyable. I use my phone daily for various tasks, from reading and browsing to watching videos, and the display quality greatly impacts my satisfaction.
  2. Performance: As someone who uses my phone for multitasking, running multiple apps, and occasionally gaming, the significantly more powerful Snapdragon 888 chipset on the OnePlus 9 is essential. The performance difference between the two phones is immense and that is more important to me than a larger battery.
  3. Camera: While I am not a professional photographer, having a good camera is important for capturing everyday moments. The higher-quality sensors, wider apertures, and multiple lens options on the OnePlus 9 will enable me to take much better photos, especially in low-light conditions.
  4. Fast Charging: The 65W fast charging on the OnePlus 9 is a huge convenience. I often find myself in situations where I need a quick battery top-up, and this feature ensures I can quickly get back to using my phone without being tethered to a charger for too long.
  5. Overall Experience: I am willing to pay a higher price point for a more premium experience. The OnePlus 9 offers features like a high-quality display, better audio and better performance that significantly enhance my overall enjoyment of the phone.

While the Xiaomi Poco M4 5G could be a good choice for a user on a very strict budget who needs long battery life, the OnePlus 9 is worth the extra investment for users who prioritize high-end performance, display, and camera capabilities.

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.