OnePlus 9 vs Xiaomi Poco C65 - Detailed Phone Comparison

Detailed Comparison

Specification
OnePlus 9
OnePlus 9
Oneplus

General

Launch Date March 26, 2021 November 6, 2023
Release Year 2021 2023

Physical

Volume 103.29 cm³ 106.14 cm³
Screen Size to Weight Ratio 3.41 "/g 3.51 "/g
Weight 192 g 192 g
Height 160 mm 168 mm
Width 74.2 mm 78 mm
Thickness 8.7 mm 8.1 mm
Foldable Design No No
Available Colors
  • Winter Mist
  • Arctic Sky
  • Astral Black
  • Black
  • Blue
  • Purple

Display

Screen Size 6.55 " 6.74 "
Resolution 1080 x 2400 720 x 1600
Aspect Ratio 20:9 20:9
Screen-to-Body Ratio 87.2 % 83.7 %
Pixel Density 402 PPI 260 PPI
Refresh Rate 120 Hz 90 Hz
Typical Brightness N/A 450 nits
HBM Brightness N/A 600 nits
Peak Brightness 1100 nits N/A

Hardware

Battery Capacity per Screen Area 104.89 mAh/in² 110.07 mAh/in²
Battery Density 43.57 mAh/cm³ 47.11 mAh/cm³
Battery Capacity 4500 mAh 5000 mAh
NFC Support Yes Yes
Chipset Qualcomm SM8350 Snapdragon 888 5G (5 nm) Mediatek MT6769Z Helio G85 (12 nm)
CPU Octa-core (1x2.84 GHz Cortex-X1 & 3x2.42 GHz Cortex-A78 & 4x1.80 GHz Cortex-A55) Octa-core (2x2.0 GHz Cortex-A75 & 6x1.8 GHz Cortex-A55)
GPU Adreno 660 Mali-G52 MC2

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 USB Type-C 2.0

Software

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

Comparison Summary

1. Specifications Comparison

FeatureOnePlus 9Xiaomi Poco C65Practical Impact
Design
Dimensions160 × 74.2 × 8.7 mm168 × 78 × 8.1 mmXiaomi Poco C65 is taller and wider, but slightly thinner. OnePlus 9 might feel more compact in hand.
Weight192g192gBoth phones have the same weight, likely feeling similar in terms of heft.
Display
Size6.55"6.74"Xiaomi Poco C65 provides a slightly larger screen, better for media consumption but with reduced portability.
Resolution1080x2400720x1600OnePlus 9 offers a significantly sharper display, with clearer text and images.
Pixel Density402 PPI260 PPIOnePlus 9 has a much sharper and more detailed display, especially noticeable when reading small text or viewing high-resolution content.
TechnologyAMOLEDIPS LCDOnePlus 9 has superior contrast, deeper blacks, more vibrant colors and better power efficiency when using dark themes.
Refresh Rate120Hz90HzOnePlus 9 provides slightly smoother scrolling and animations, enhancing the perceived responsiveness of the phone.
Brightness1100 nits0 nitsOnePlus 9 has drastically superior outdoor visibility, making it much easier to see the screen in bright sunlight. The brightness for the C65 is missing.
Performance
ChipsetQualcomm Snapdragon 888 (5 nm)MediaTek Helio G85 (12 nm)OnePlus 9 provides significantly higher performance, faster app loading, smoother multitasking and better gaming experience.
AnTuTu Score880,900237,768OnePlus 9 has far superior benchmark performance, indicative of much faster processing and smoother overall experience.
GPUAdreno 660Mali-G52 MC2OnePlus 9 offers a significantly more powerful GPU for better gaming performance and graphics-intensive tasks.
Camera
Main Camera48MP f/1.79 1/1.4"50MP f/1.8 1/2.76"OnePlus 9 has a larger sensor and wider aperture resulting in better low-light performance and potentially better image quality overall.
Selfie Camera16MP f/2.4 1/3.13"8MP f/2.2 (Sensor size and pixel size missing)OnePlus 9 offers higher resolution selfies, potentially leading to more detail and clearer images. Xiaomi Poco C65 has slightly wider aperture.
Wide Angle Lens50MP f/2.2 1/1.56"NoneOnePlus 9 has a dedicated ultra-wide camera for capturing expansive scenes.
Portrait LensNone2MP f/2.4Xiaomi Poco C65 has a dedicated lens for creating depth-of-field effects in portrait mode.
Macro LensNone2MP f/2.4Xiaomi Poco C65 includes a macro lens for close-up shots of small subjects.
Black & White2MP f/2.4NoneOnePlus 9 has a dedicated B&W lens for monochrome photos.
Video8K@30fps, 4K@60fps1080p@30fpsOnePlus 9 provides significantly higher video quality, including 8K recording and higher frame rate options for smoother videos.
Battery
Capacity4500mAh5000mAhXiaomi Poco C65 has a larger battery capacity, likely leading to longer battery life.
Charging65W fast charging18W fast chargingOnePlus 9 charges much faster, reducing downtime and allowing for quick top-ups.
Features15W Wireless ChargingReverse chargingOnePlus 9 offers wireless charging, while Xiaomi Poco C65 can act as a power bank for other devices.
Software
OSAndroid 11 (upgradable to 13)Android 13Xiaomi Poco C65 runs on a newer Android version out of the box.
Connectivity
Wi-FiWi-Fi 6 (802.11ax)Wi-Fi 5 (802.11ac)OnePlus 9 supports Wi-Fi 6 for faster speeds and better network performance.
Bluetooth5.25.3Xiaomi Poco C65 has newer Bluetooth.
GPSDual-band GPSGPSOnePlus 9 offers more accurate GPS positioning with dual-band support.
Storage
Internal128/256 GB128/256 GBBoth have the same storage options.
RAM8/12 GB4/6/8 GBOnePlus 9 has more RAM (12GB max), which allows smoother multitasking.
ExpandableNoNoNeither phone supports expandable storage.
Audio
QualityDolby Atmos, Stereo speakersBasic audio featuresOnePlus 9 offers superior audio quality with enhanced spatial audio and stereo speakers.
Security
FeaturesIn-display fingerprintSide-mounted fingerprintXiaomi Poco C65 offers a more advanced, side mounted fingerprint sensor.
Build Quality
ProtectionGorilla Glass 5UnknownOnePlus 9 offers better screen protection against scratches and minor impacts. The screen protection for Xiaomi Poco C65 is unknown.
Sensors
SensorsAccelerometer, Compass, Gyroscope, ProximityAccelerometer, Compass, Gyroscope, Ultrasonic proximity virtualBoth phones have a comprehensive sensor suite for advanced features.

2. Key Differences Analysis

OnePlus 9 Advantages:

  • Superior Display: Significantly higher resolution, pixel density, AMOLED technology, and 120Hz refresh rate offer a much better viewing experience, especially for media consumption and gaming.
  • Flagship Performance: The Snapdragon 888 chipset provides substantially better performance for all tasks, including gaming and multitasking.
  • Higher Quality Camera System: Larger sensors, wider apertures, and dedicated ultra-wide lens offer better image quality, especially in low light, and more versatility. Offers higher video resolution (up to 8K).
  • Much Faster Charging: 65W fast charging significantly reduces charging time.
  • Premium Features: Offers features like wireless charging, Dolby Atmos, and dual-band GPS.
  • Screen Protection: Corning Gorilla Glass 5 provides protection against scratches and minor impacts.

Xiaomi Poco C65 Advantages:

  • Larger Battery: 5000 mAh provides a likely better battery life.
  • Newer Software: Ships with Android 13 out of the box.
  • Expandable Storage: While the table states that expandable storage is not available on either device, this is incorrect. The Xiaomi Poco C65 has a dedicated microSD card slot.
  • Newer Bluetooth: Offers newer bluetooth version
  • Reverse Charging: The device can be used to charge other devices.
  • Side-mounted Fingerprint Sensor: A more convenient fingerprint unlock placement compared to an in-display sensor.
  • Lower Price: Typically costs significantly less than the OnePlus 9.

Significant Trade-offs:

  • OnePlus 9: Higher cost and may have a slightly shorter battery life.
  • Xiaomi Poco C65: Compromises significantly on display quality, performance, camera quality and charging speed to reach a lower price point.

3. User Profiles & Recommendations

OnePlus 9 Ideal Users:

  • Power Users: Those who need high performance for gaming, video editing, and heavy multitasking.
  • Media Consumers: Users who prioritize excellent display quality for watching videos and movies.
  • Photography Enthusiasts: Those who want a versatile and high-quality camera system for capturing photos and videos.
  • Tech Enthusiasts: Users who appreciate premium features and faster wireless charging.

Xiaomi Poco C65 Ideal Users:

  • Budget-Conscious Buyers: Those looking for a cost-effective smartphone with a decent battery.
  • Casual Users: Those who use their phone primarily for basic tasks like calling, messaging, social media, and browsing.
  • Users Prioritizing Battery Life: Those who need a phone that can last through a full day on a single charge.
  • Users preferring side-mounted fingerprint scanners: Users who prefer the placement of side-mounted fingerprint scanners.

Use Cases:

  • OnePlus 9: Gaming (high-end graphics), professional photography/videography, VR/AR experiences, mobile workstation.
  • Xiaomi Poco C65: Social media browsing, casual gaming, daily communication, media streaming, as a secondary phone for travel/backup.

4. Decision Framework

Key Questions for Buyers:

  1. What is your budget? The OnePlus 9 is generally more expensive.
  2. How important is display quality to you? The OnePlus 9 has a much higher quality screen.
  3. What tasks do you primarily use your phone for? For demanding tasks, the OnePlus 9 is much better.

Scenario-Based Recommendations:

  • Scenario 1 (High Performance): If you need high performance for gaming, content creation, or heavy multitasking, the OnePlus 9 is the clear choice.
  • Scenario 2 (Budget): If you're on a tight budget and only need a basic phone for essential tasks, the Xiaomi Poco C65 is a more economical option.
  • Scenario 3 (Balanced Usage): If you are a budget conscious buyer but you still desire a decent performance and good user experience, the OnePlus 9 is the better choice.

My Choice

Given the specifications, I would choose the OnePlus 9.

Reasoning:

The OnePlus 9 is a more compelling choice for me. The significant advantage in display quality, processing power, and camera capabilities make it a better fit for my needs, including media consumption, photography, and demanding games. While the Xiaomi Poco C65 offers a larger battery and a lower price, the compromise in display, performance, and camera quality would impact my daily usage far more. The OnePlus 9 delivers a significantly more premium and enjoyable experience, making it worth the additional cost for my use cases. The difference in charging speeds is also a major factor, as I tend to need to top up my phone quickly throughout the day.

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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