Xiaomi Redmi Note 9T vs OnePlus 9 - Detailed Phone Comparison

Detailed Comparison

Specification
OnePlus 9
OnePlus 9
Oneplus

General

Launch Date January 18, 2021 March 26, 2021
Release Year 2021 2021

Physical

Volume 113.39 cm³ 103.29 cm³
Screen Size to Weight Ratio 3.28 "/g 3.41 "/g
Weight 199 g 192 g
Height 161.2 mm 160 mm
Width 77.3 mm 74.2 mm
Thickness 9.1 mm 8.7 mm
Foldable Design No No
Available Colors
  • Nightfall Black
  • Daybreak Purple
  • 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 84 % 87.2 %
Pixel Density 395 PPI 402 PPI
Refresh Rate N/A 120 Hz
Typical Brightness 450 nits N/A
HBM Brightness N/A N/A
Peak Brightness N/A 1100 nits

Hardware

Battery Capacity per Screen Area 117.26 mAh/in² 104.89 mAh/in²
Battery Density 44.09 mAh/cm³ 43.57 mAh/cm³
Battery Capacity 5000 mAh 4500 mAh
NFC Support Yes Yes
Chipset Mediatek Dimensity 800U (7 nm) Qualcomm SM8350 Snapdragon 888 5G (5 nm)
CPU Octa-core (2x2.4 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55) Octa-core (1x2.84 GHz Cortex-X1 & 3x2.42 GHz Cortex-A78 & 4x1.80 GHz Cortex-A55)
GPU Mali-G57 MC3 Adreno 660

Connectivity

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

Software

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

Comparison Summary

Smartphone Comparison: Xiaomi Redmi Note 9T vs. OnePlus 9

1. Specifications Comparison

FeatureXiaomi Redmi Note 9TOnePlus 9Practical Impact
Design
Dimensions161.2 × 77.3 × 9.1 mm160 × 74.2 × 8.7 mmRedmi Note 9T is slightly larger and thicker, may feel bulkier in hand. OnePlus 9 is more compact and comfortable to hold for extended periods.
Weight199g192gOnePlus 9 is slightly lighter, which might be noticeable during prolonged use and increase overall comfort.
Display
Size6.53"6.55"Negligible difference in screen size; Both provide similar viewing real estate.
Resolution1080x23401080x2400Very similar sharpness; Both provide a good visual experience at a standard 1080p resolution.
PPI395402Insignificant difference in pixel density; Both displays will appear equally sharp to the naked eye.
TechnologyIPS LCDAMOLEDAMOLED offers deeper blacks, higher contrast, more vibrant colors, and better power efficiency, especially with dark mode enabled.
Refresh Rate60Hz120HzOnePlus 9 provides much smoother scrolling, animations, and gameplay due to the higher refresh rate.
Brightness0 nits1100 nitsOnePlus 9 offers vastly superior outdoor visibility, making it easier to see the screen in bright sunlight.
Performance
ChipsetMediatek Dimensity 800U (7 nm)Qualcomm Snapdragon 888 5G (5 nm)Snapdragon 888 is significantly more powerful, leading to faster app loading, smoother multitasking, and better gaming performance.
AnTuTu Score343,150880,900OnePlus 9 provides a much faster and more responsive experience, including demanding apps and games. The difference is very significant in benchmark numbers.
GPUMali-G57 MC3 (ARM Mali-G57 MC3)Adreno 660 (Adreno 660)Adreno 660 provides better graphics performance, which translates to smoother gameplay and higher frame rates in graphic-intensive applications.
Camera
Main Camera SensorSamsung S5KGM2 (1/2", 0.8µm)Sony IMX689 (1/1.4", 1.12µm)OnePlus 9's larger sensor with bigger pixels generally captures more light, leading to better low-light performance and dynamic range.
Wide Angle lensNoneSony IMX766 (1/1.56", 1.00µm)OnePlus 9 offers an ultrawide lens for more versatile photography.
Selfie Camera13MP, f/2.25 (1/3.1", 1.12µm)16MP, f/2.4 (1/3.13", 1.00µm)OnePlus 9 has a slightly higher resolution.
Macro/Portrait lens2MP eachNoneRedmi Note 9T includes a dedicated macro and portrait depth sensor for enhanced close up and portrait photography.
VideoUp to 4K@30fpsUp to 8K@30fps, 4K@60fpsOnePlus 9 offers much more capable video recording with 8K support, 4K at 60fps, and better stabilization.
Battery
Capacity5000mAh4500mAhRedmi Note 9T offers a larger battery, potentially providing longer battery life for most users.
Charging18W fast charging65W fast charging, 15W WirelessOnePlus 9 charges much faster, reducing downtime. Wireless charging adds convenience.
Software
OSAndroid 10Android 11 (upgradeable to 13)OnePlus 9 is on a newer OS with more features and security updates.
Connectivity
Wi-FiWi-Fi 5Wi-Fi 6OnePlus 9 provides faster and more reliable wireless connections in compatible networks.
BluetoothBluetooth 5.1Bluetooth 5.2OnePlus 9 has a slightly newer version with more efficient and reliable connections.
Storage & RAM
Internal Storage64GB/128GB128GB/256GBOnePlus 9 offers more storage capacity in the base model, and a higher capacity option.
RAM4GB8GB/12GBOnePlus 9 has significantly more RAM, allowing for smoother multitasking and better app retention in memory.
Other
Audio QualityHi-Res Audio, Stereo SpeakersDolby Atmos, Stereo SpeakersOnePlus 9’s Dolby Atmos provides a more immersive and richer audio experience, with more clarity and depth.
SecuritySide-mounted fingerprint sensorBasic fingerprint sensorSide-mounted fingerprint sensor on the Xiaomi Redmi Note 9T might be more accessible to some users.
Build QualityCorning Gorilla Glass 5Corning Gorilla Glass 5Both phones have the same level of scratch protection on their displays.

2. Key Differences Analysis

Xiaomi Redmi Note 9T Advantages:

  • Larger Battery: The 5000mAh battery offers potentially longer battery life, suitable for users who need their phone to last through a full day of heavy use.
  • More Convenient Fingerprint Sensor: The side-mounted fingerprint sensor may be more accessible than an in-display sensor for some users.
  • Lower Price Point: Typically more affordable, making it a budget-friendly option.
  • Dedicated Macro and Depth lenses: Allow for more versatile photography.

OnePlus 9 Advantages:

  • Superior Display: The AMOLED display with a 120Hz refresh rate provides a vastly better visual experience with more vibrant colors, smoother animations and better visibility in direct sunlight.
  • Significantly More Powerful Processor: The Snapdragon 888 chipset delivers significantly better performance for gaming, multitasking, and resource-intensive applications.
  • Faster Charging: 65W fast charging rapidly replenishes the battery, greatly reducing downtime.
  • Better Camera System: Larger main camera sensor, plus ultrawide and higher video recording quality.
  • More RAM & Storage: Higher base storage and RAM means better performance and storage capacity.
  • Upgraded Software: Newer operating system with better long term support.
  • Better Audio: Dolby Atmos provides a richer audio experience with enhanced clarity.

Trade-offs:

  • Redmi Note 9T: Offers better battery life at the cost of lower performance, display quality, and camera capabilities.
  • OnePlus 9: Offers top-tier performance and quality at the cost of a higher price point and slightly smaller battery capacity.

3. User Profiles & Recommendations

Xiaomi Redmi Note 9T:

  • Ideal User: Budget-conscious users, those who prioritize battery life over top-tier performance, and casual smartphone users.
  • Use Cases:
    • Everyday tasks like browsing, social media, and messaging.
    • Users who need a reliable phone for general use throughout the day without frequent charging.
    • Users who take occasional photos and don’t require top-tier camera performance.
  • Price-to-Value: Offers good value for the price, especially for users with basic needs.

OnePlus 9:

  • Ideal User: Users who want a premium smartphone experience with top-tier performance, superior display quality, excellent camera capabilities, and fast charging.
  • Use Cases:
    • Gaming enthusiasts who need smooth gameplay and high frame rates.
    • Power users who multitask with demanding applications.
    • Users who take high-quality photos and videos regularly.
    • Users who want the best possible visual experience.
  • Price-to-Value: Justifies its higher price with top-tier features, faster speeds and improved display.

4. Decision Framework

Key Questions for Buyers:

  1. Budget: How much are you willing to spend? If budget is a primary concern, Redmi Note 9T is the better choice.
  2. Performance Needs: How important is top-tier performance for gaming and demanding applications? If performance is critical, OnePlus 9 is the only sensible choice.
  3. Display Preference: Do you value a vibrant display with high refresh rate or is a basic display sufficient? If high quality display is what you are after, the OnePlus 9 is the better option.

Scenario-Based Recommendations:

  • Scenario 1: Basic User, Budget Conscious: If you primarily use your phone for calls, messages, and basic social media browsing, the Xiaomi Redmi Note 9T is a solid and affordable choice with great battery life.
  • Scenario 2: Mobile Gamer, Multitasker: If you play demanding mobile games, or run resource intensive applications, the OnePlus 9 is the better choice with its significantly more powerful processor, RAM, and 120Hz display.
  • Scenario 3: Camera Enthusiast, Quality Videographer: If you frequently take photos and videos, the OnePlus 9, with its superior sensors and higher video resolutions, will give you the best results.

My Choice

If I were choosing between these two phones, I would choose the OnePlus 9. While the Redmi Note 9T has better battery life and a lower price, the difference in performance and display quality is very significant. The OnePlus 9 offers a premium experience in every aspect with its significantly faster performance, much better screen and much faster charging capabilities. The 120Hz AMOLED screen, Snapdragon 888 processor, and more advanced camera system of the OnePlus 9 provide a user experience that is far superior to the Redmi Note 9T. In my opinion, the extra expense is worth the benefits of overall performance and functionality. The faster charging also mitigates most of my concerns about the smaller battery.

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.