OnePlus 9 Pro vs Xiaomi Redmi A2 - Detailed Phone Comparison

Detailed Comparison

Specification
OnePlus 9 Pro
OnePlus 9 Pro
Oneplus

General

Launch Date March 30, 2021 March 24, 2023
Release Year 2021 2023

Physical

Volume 104.5 cm³ 115.25 cm³
Screen Size to Weight Ratio 3.4 "/g 3.4 "/g
Weight 197 g 192 g
Height 163.2 mm 164.9 mm
Width 73.6 mm 76.8 mm
Thickness 8.7 mm 9.1 mm
Foldable Design No No
Available Colors
  • Forest Green
  • Morning Mist
  • Stellar Black
  • Aqua Blue
  • Classic Black
  • Sea Green

Display

Screen Size 6.7 " 6.52 "
Resolution 1440 x 3216 720 x 1600
Aspect Ratio 20:9 20:9
Screen-to-Body Ratio 89.9 % 81 %
Pixel Density 525 PPI 269 PPI
Refresh Rate 120 Hz N/A
Typical Brightness N/A 400 nits
HBM Brightness N/A N/A
Peak Brightness 1300 nits N/A

Hardware

Battery Capacity per Screen Area 100.25 mAh/in² 117.62 mAh/in²
Battery Density 43.06 mAh/cm³ 43.39 mAh/cm³
Battery Capacity 4500 mAh 5000 mAh
NFC Support Yes No
Chipset Qualcomm SM8350 Snapdragon 888 5G (5 nm) Mediatek Helio G36 (12 nm)
CPU Octa-core (1x2.84 GHz Cortex-X1 & 3x2.42 GHz Cortex-A78 & 4x1.80 GHz Cortex-A55 Octa-core (4x2.2 GHz Cortex-A53 & 4x1.7 GHz Cortex-A53)
GPU Adreno 660 PowerVR GE8320

Connectivity

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

Software

Operating System Android Android
Initial OS Version 11 12
Maximum OS Version 14

Comparison Summary

Smartphone Comparison: OnePlus 9 Pro vs. Xiaomi Redmi A2

1. Specifications Comparison

FeatureOnePlus 9 ProXiaomi Redmi A2Practical Impact
Design
Dimensions163.2 x 73.6 x 8.7 mm164.9 x 76.8 x 9.1 mmRedmi A2 is slightly taller, wider, and thicker, making the 9 Pro more comfortable in hand for some.
Weight197g192gRedmi A2 is slightly lighter, which may be noticeable during extended use.
Display
Size6.7"6.52"OnePlus 9 Pro offers a slightly larger display for more immersive content consumption.
Resolution1440 x 3216720 x 1600OnePlus 9 Pro's display is significantly sharper, offering far more detail for text and images.
Pixel Density (PPI)525269OnePlus 9 Pro has much sharper text and images, better for viewing high-resolution content.
TechnologyMissingIPS LCDRedmi A2 has an IPS LCD screen, which is typical for budget phones, providing decent colours and viewing angles. The technology of the OnePlus is missing.
Refresh Rate120Hz60HzOnePlus 9 Pro has much smoother animations, scrolling, and gaming.
Brightness1300 nits0 nitsOnePlus 9 Pro offers significantly better visibility in bright sunlight; the Redmi A2's screen may be difficult to see outdoors.
Performance
ChipsetQualcomm Snapdragon 888 5G (5 nm)Mediatek Helio G36 (12 nm)OnePlus 9 Pro offers significantly faster processing speed for demanding tasks like gaming and multitasking.
AnTuTu Score877,600127,000OnePlus 9 Pro provides a much faster overall experience, with smoother app loading and more responsive interface.
GPUAdreno 660PowerVR GE8320OnePlus 9 Pro's GPU is much more powerful, handling demanding games and graphics-intensive applications better.
Camera
Rear (Standard)48MP, f/1.8, 1/1.43", Sony IMX7898MP, f/2.0, MissingOnePlus 9 Pro takes much higher-resolution photos with better low-light performance.
Front (Selfie)16MP, f/2.4, 1/3.13", Sony IMX471 Exmor RS5MP, f/2.2, MissingOnePlus 9 Pro captures higher-quality selfies with more detail.
Telephoto Lens8MP, f/2.4, 1/4.4", Omnivision OV08A10NoneOnePlus 9 Pro offers optical zoom capabilities for better quality zoomed images.
Wide Angle Lens50MP, f/2.2, 1/1.56", Sony IMX766NoneOnePlus 9 Pro allows for capturing expansive scenes with a dedicated ultra-wide camera.
Black & White Camera2MP, f/2.4NoneOnePlus 9 Pro has a dedicated black and white sensor for more artistic photos.
Video Recording8K@30fps, 4K@120fps, HDR, EIS1080p@30fpsOnePlus 9 Pro records much higher-quality videos with advanced stabilization features.
DxOMark Score122 (Mobile), 124 (Photo), 118 (Video)NoneOnePlus 9 Pro has superior camera quality based on its DxOMark results, capturing better quality photos and videos.
Camera Features4K Video, 8K Video, Optical zoom, OIS, RAW, Night Mode, etc.Digital zoom, Autofocus, HDR, etc.OnePlus 9 Pro has a significantly more versatile camera with many advanced features.
Battery
Capacity4500mAh5000mAhRedmi A2 has a slightly larger battery, potentially offering longer battery life.
Charging65W Fast Charging, Wireless 50W, Reverse wireless10W Fast ChargingOnePlus 9 Pro charges much faster and also supports wireless and reverse wireless charging.
Battery FeaturesReverse charging, wireless chargingNon-removableOnePlus 9 Pro offers more charging options and features.
Software
OSAndroid 11 (upgradable to 14)Android 12Redmi A2 comes with a slightly newer base OS, but the OnePlus 9 Pro is upgradable to a newer version than the base OS of Redmi A2.
Connectivity
Wi-FiWi-Fi 6 (802.11ax)802.11nOnePlus 9 Pro supports faster and more modern Wi-Fi standards for better network performance.
Bluetooth5.2, aptX, LDAC5.0, EDROnePlus 9 Pro has a newer version of bluetooth, with better audio codec support for higher quality audio.
GPSGPS (L1+L5), GalileoGPS, GLONASS, BeidouOnePlus 9 Pro offers more accurate location tracking.
SIMDual SIM Dual StandbyDual SIM Dual StandbyBoth support dual SIM cards.
Storage
Internal128GB/256GB32GB/64GBOnePlus 9 Pro offers significantly more built-in storage for photos, videos and apps.
RAM8GB/12GB2GB/3GB/4GBOnePlus 9 Pro has much more RAM, improving multitasking and performance.
Expandable StorageNoNoNeither phone has expandable storage.
Audio
QualityDolby Atmos, Stereo Speakers, 3 MicrophonesBasic audio featuresOnePlus 9 Pro offers superior audio quality with better speaker performance, and clearer calls.
Security
FeaturesFingerprint SensorBasic security featuresOnePlus 9 Pro offers fingerprint sensor for enhanced security.
Build Quality
Screen ProtectionCorning Gorilla Glass 5UnknownOnePlus 9 Pro uses a screen with known protection from scratches and minor impacts.
Sensors
SensorsFingerprint, Proximity, Accelerometer, Compass, GyroscopeAccelerometer, Ultrasonic ProximityOnePlus 9 Pro has more advanced sensors for advanced functionality.

2. Key Differences Analysis

OnePlus 9 Pro Advantages:

  • Superior Display: Higher resolution, pixel density, 120Hz refresh rate, and much higher brightness. This makes the display noticeably sharper, smoother, and better for outdoor use.
  • Much Higher Performance: The Snapdragon 888 chipset and significantly higher AnTuTu score means much smoother and faster app loading, multitasking, and gaming.
  • Far Superior Camera: Higher resolution sensors, additional lenses (telephoto, wide-angle), better low-light performance, and 8K video capabilities. It also has more features like OIS and RAW capture.
  • Faster Charging and Wireless Charging: 65W wired and 50W wireless charging, including reverse wireless, is much more versatile and convenient.
  • More Storage and RAM: Up to 256GB storage and 12GB of RAM, resulting in better multitasking and longevity.
  • Advanced Connectivity: Newer Wi-Fi standard (Wi-Fi 6) and Bluetooth 5.2 for faster, more stable connections.
  • Enhanced Audio: Stereo speakers, Dolby Atmos, and noise-canceling microphones offer a significantly better audio experience.
  • Better Build Quality: Gorilla Glass 5 screen protection provides durability.

Xiaomi Redmi A2 Advantages:

  • Slightly Lighter: 5g lighter which could matter for long use periods.
  • Larger Battery: 500mAh more capacity means potentially longer battery life, although this would be offset by the higher power consumption of the OnePlus 9 Pro.
  • Newer Base OS: Android 12 out of the box, though the OnePlus can be upgraded to Android 14.
  • Price: Likely significantly more affordable than the OnePlus 9 Pro.

Trade-offs:

  • OnePlus 9 Pro: Higher cost; slightly smaller battery; larger and heavier,
  • Xiaomi Redmi A2: Significantly lower performance, poor display, basic camera, slow charging, limited storage and RAM, and less advanced features.

3. User Profiles & Recommendations

OnePlus 9 Pro:

  • Ideal User: Power users, mobile gamers, photography enthusiasts, and anyone who values a premium experience and fast performance.
  • Use Cases:
    • Demanding mobile gaming with smooth graphics and no lag
    • Professional or enthusiast-level photography and videography
    • Viewing high-resolution media and content
    • Multitasking between multiple resource-intensive apps
    • Users needing a high-quality display for bright outdoor conditions.

Xiaomi Redmi A2:

  • Ideal User: Budget-conscious buyers, first-time smartphone users, and those with basic needs.
  • Use Cases:
    • Basic communication (calls, texts)
    • Casual web browsing and social media
    • Simple, non-demanding apps
    • Users who prioritize battery life over performance.
    • As a secondary or emergency phone

Price-to-Value Ratio:

  • The OnePlus 9 Pro justifies its higher price with significant performance, camera, and display quality gains.
  • The Xiaomi Redmi A2 offers a basic smartphone experience at a significantly lower price.

4. Decision Framework

Key Questions:

  1. What is your budget? If very limited, the Redmi A2 is the more affordable option.
  2. What are your primary uses for the phone? Do you need high performance, a great camera, and a top display, or do you mostly use it for basic tasks?
  3. How important are display quality, camera features, and speed to you? If important, the OnePlus 9 Pro is a clear choice.

Scenario-Based Recommendations:

  • Scenario 1: You are a mobile gamer and want the best possible performance and display. Recommendation: OnePlus 9 Pro is the clear choice.
  • Scenario 2: You only need a phone for calls, texts, and basic social media, and you're on a strict budget. Recommendation: Xiaomi Redmi A2 is suitable.
  • Scenario 3: You want a good camera and the ability to edit videos on the go. Recommendation: OnePlus 9 Pro is ideal for content creators who want versatile capture and post-processing.
  • Scenario 4: You watch a lot of videos and need a good display for outdoor use and don't want to spend a lot. Recommendation: The OnePlus 9 Pro is better due to its superior display and brightness but is a much higher price, if this is too expensive the Redmi A2 may be the better fit.

My Choice

If I were choosing between these two phones, I would choose the OnePlus 9 Pro. While it is significantly more expensive, the sheer difference in performance, display quality, camera capabilities, and overall user experience is overwhelming. As someone who uses their phone for a variety of tasks, including content consumption, some gaming, photography, and productivity, the OnePlus 9 Pro's superior specifications justify the higher price. The Redmi A2, on the other hand, seems better suited for basic usage, where performance, display and camera are not a priority and the price is the main focus. The OnePlus 9 Pro would offer a much more satisfying experience in the long run due to its higher build quality and better hardware.

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
  • Digital media communication
  • Technical storytelling
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Bridging technical complexity with engaging, accessible narratives.