vivo V21 5G vs Xiaomi Poco X3 GT - Detailed Phone Comparison

Detailed Comparison

Specification

General

Launch Date May 6, 2021 August 19, 2021
Release Year 2021 2021

Physical

Volume 86.15 cm³ 110.31 cm³
Screen Size to Weight Ratio 3.66 "/g 3.42 "/g
Weight 176 g 193 g
Height 159.7 mm 163.3 mm
Width 73.9 mm 75.9 mm
Thickness 7.3 mm 8.9 mm
Foldable Design No No
Available Colors
  • Arctic White
  • Dusk Blue
  • Sunset Dazzle
  • Cloud White
  • Stargaze Black
  • Wave Blue

Display

Screen Size 6.44 " 6.6 "
Resolution 1080 x 2400 1080 x 2400
Aspect Ratio 20:9 20:9
Screen-to-Body Ratio 84.8 % 84.9 %
Pixel Density 409 PPI 399 PPI
Refresh Rate 90 Hz 120 Hz
Typical Brightness 500 nits 450 nits
HBM Brightness N/A N/A
Peak Brightness N/A N/A

Hardware

Battery Capacity per Screen Area 96.45 mAh/in² 114.78 mAh/in²
Battery Density 46.43 mAh/cm³ 45.33 mAh/cm³
Battery Capacity 4000 mAh 5000 mAh
NFC Support Yes Yes
Chipset Mediatek Dimensity 800U (7 nm) Mediatek Dimensity 1100 (6 nm)
CPU Octa-core (2x2.4 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55) Octa-core (4x2.6 GHz Cortex-A78 & 4x2.0 GHz Cortex-A55)
GPU Mali-G57 MC3 Mali-G77 MC9

Connectivity

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

Software

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

Comparison Summary

Smartphone Comparison: vivo V21 5G vs. Xiaomi Poco X3 GT

1. Specifications Comparison

Featurevivo V21 5GXiaomi Poco X3 GTPractical Impact
Design
Dimensions159.7 × 73.9 × 7.3 mm163.3 × 75.9 × 8.9 mmPoco X3 GT is larger and thicker, making it less pocketable but potentially more comfortable for large hands; V21 5G is more sleek
Weight176g193gV21 5G is significantly lighter, better for prolonged use and feels more portable
Display
Size6.44"6.6"Poco X3 GT has slightly larger screen; better for media consumption
Resolution1080x24001080x2400Both offer the same clarity and sharpness
PPI409399Both displays are sharp; pixel density is practically identical
TechnologyAMOLEDIPS LCDV21 5G's AMOLED offers richer colors, deeper blacks, better contrast, and more efficient dark mode, superior viewing experience
Refresh Rate90Hz120HzPoco X3 GT will offer smoother scrolling and animations, beneficial for gaming and fast-paced content consumption
Brightness0 nits0 nitsBoth phones have identical peak brightness, but this is an unrealistic value. Data is missing for both phones
Performance
ChipsetMediatek Dimensity 800U (7 nm)Mediatek Dimensity 1100 (6 nm)Poco X3 GT's chipset is significantly more powerful, leading to faster app loading, smoother multitasking, and better gaming performance
AnTuTu Score343,150745,283Poco X3 GT has significantly better benchmark score, indicating much better raw performance capabilities
GPUMali-G57 MC3 (ARM Mali-G57 MC3)Mali-G77 MC9 (ARM Mali-G77)Poco X3 GT's GPU is significantly more powerful, leading to better gaming and graphics performance
Battery
Capacity4000mAh5000mAhPoco X3 GT's larger battery will likely offer significantly longer battery life; especially for extended use
Charging33W Fast Charging67W Fast ChargingPoco X3 GT will charge much faster, reducing downtime
Camera
Main Camera64MP, f/1.79, 0.80µm pixel size64MP, f/1.79, 1/2" sensor, 0.70µm pixel size, Omnivision OV64BBoth have 64MP primary sensor, but sensor size and pixel size differ, leading to varying image qualities
Selfie Camera44MP, f/2.0, 1/2.65" sensor, 0.70µm pixel size, Samsung S5KGH116MP, f/2.45, unknown sensor & pixel sizeV21 5G has a much higher resolution selfie camera with a wider aperture, leading to better selfies, especially in low light
Wide Angle Lens8MP, f/2.2NoV21 5G includes an ultrawide camera for capturing more expansive landscapes; X3 GT lacks this feature
Macro Lens2MP, f/2.4NoV21 5G has a dedicated macro lens for close-up shots; X3 GT lacks this feature
Video Recording4K@30fps with OIS, 1080p@30/60 with OIS4K@30fps, 1080p@30/60/120fpsBoth can record 4K, but V21 5G has OIS for smoother videos. The X3 GT records 120fps videos
Camera FeaturesOIS, PDAF, Front FlashManual focus, RAW, Night ModeV21 5G excels in low light photography and smoother videos due to OIS. X3 GT provides more professional controls with RAW capture and Night mode.
Software
OSAndroid 11Android 11Both run Android 11 at launch
Connectivity
WiFiWi-Fi 5 (ac)Wi-Fi 6 (ax)Poco X3 GT offers faster and more efficient WiFi performance, especially in congested networks
BluetoothBluetooth 5.1 with LE, APT-x, LDAC, SBCBluetooth 5.2 with LE, APT-x, LDAC, AACPoco X3 GT has a newer Bluetooth version; both support advanced audio codecs
GPSGPS, A-GPS, GLONASS, Beidou, GalileoGPS, A-GPS, GLONASS, Beidou, QZSS, Galileo, BeiDou (B1)Poco X3 GT offers more accurate location tracking with more satellite system support
SIMDual SIM Dual Standby (Nano SIM + Nano SIM)Dual SIM Dual Standby (Nano SIM + Nano SIM)Both support dual SIM functionality with Nano SIM cards
Storage
Internal128/256 GB128/256 GBBoth come in 128GB and 256GB storage options
RAM8 GB8 GBBoth have enough RAM for multitasking
ExpandableNoNoNeither phone has expandable storage
Audio
Audio QualityBasic Audio FeaturesDolby Atmos, Hi-Res Audio, Stereo Speakers, 2 micsPoco X3 GT offers a significantly better audio experience with stereo speakers and enhanced technologies
Security
Featuresbasic fingerprint sensorside-mounted fingerprint sensorPoco X3 GT's fingerprint sensor is more convenient
Build Quality
ProtectionUnknownCorning Gorilla Glass VictusPoco X3 GT has better scratch and drop protection for the screen
Sensors
FeaturesFingerprint, Proximity, Accelerometer, Compass, GyroscopeFingerprint, Accelerometer, Compass, Gyroscope, Ultrasonic proximity virtualBoth have common sensors but differ on proximity; V21 has a regular proximity sensor and X3 GT has an ultrasonic virtual proximity sensor.
## 2. Key Differences Analysis

vivo V21 5G Advantages:

  • Superior Display Technology: AMOLED screen provides richer colors, deeper blacks, and better contrast than the IPS LCD on the Poco X3 GT.
  • Better Selfie Camera: Higher resolution (44MP) and wider aperture (f/2.0) result in superior selfies, especially in low light.
  • Optical Image Stabilization (OIS): OIS in both main and front cameras provides superior stabilization in video recording, which results in clearer video recordings compared to non OIS cameras
  • More Compact and Lighter Design: Easier to handle and pocket.

Xiaomi Poco X3 GT Advantages:

  • Significantly More Powerful Chipset: The Dimensity 1100 offers substantially better performance in gaming, multitasking, and app loading compared to the Dimensity 800U.
  • Larger Battery and Faster Charging: The 5000mAh battery and 67W charging provide longer battery life and much faster charging times.
  • Higher Refresh Rate: 120Hz display results in smoother animations and a more fluid user experience.
  • Superior Audio Quality: Stereo speakers with Dolby Atmos offer a more immersive audio experience.
  • Better Screen Protection: The Corning Gorilla Glass Victus offers superior scratch and impact resistance.
  • Newer Wi-Fi Standard: Wi-Fi 6 support results in faster and more efficient wireless performance.
  • More Satellites: Supports QZSS and BeiDou (B1) providing more accurate location tracking.
  • RAW photo capture and night mode: Provides flexibility in editing and better quality night photos.
  • Side mounted fingerprint sensor: More accessible and faster than traditional sensors.

Significant Trade-offs:

  • V21 5G: Sacrifices raw performance, battery life, screen refresh rate, and audio quality for a more compact design, superior display tech, and better selfie camera
  • X3 GT: Sacrifices high quality selfies, compact design, and OIS stabilization for a superior processor, battery life, refresh rate, audio quality, and superior build protection.

3. User Profiles & Recommendations

vivo V21 5G Ideal User:

  • Selfie Enthusiasts: Prioritizes front camera quality for social media and video calls.
  • Users who prefer a Sleek Design and Lightweight Phone: Values portability and in-hand comfort.
  • Media Consumers: Benefits from the vibrant AMOLED display.
  • Users who prefer a smaller phone: the V21 5G is thinner and lighter than the Poco X3 GT.
  • Casual users: Not concerned about intense gaming and high-power processing.

Use Cases:

  • Social media content creation (selfies, videos).
  • Everyday use with a focus on media consumption and browsing.
  • Users who need OIS stabilization in videos.
  • Users who need a dedicated macro and ultrawide lens.

Xiaomi Poco X3 GT Ideal User:

  • Gamers: Benefits from the powerful chipset, high refresh rate, and enhanced audio.
  • Heavy Users: Needs long battery life and fast charging.
  • Multimedia Enthusiasts: Enjoys content with high-quality audio.
  • Performance-Focused Users: Values raw power and multitasking capabilities.
  • Users who need maximum screen protection: Corning Gorilla Glass Victus provides superior scratch and drop protection.

Use Cases:

  • Mobile gaming with demanding graphics.
  • Heavy multitasking and running performance intensive apps.
  • Long work days requiring extended battery life.
  • Multimedia consumption with high audio quality.
  • Users who require raw image capture capabilities.
  • Users who require night mode.

4. Decision Framework

Key Questions for Buyers:

  1. What is my primary use case? (Gaming, photography, everyday use, multimedia consumption).
  2. Do I prioritize display quality or raw performance? (AMOLED vs. powerful chipset).
  3. Is portability or battery life more important? (Lighter design vs. larger battery).

Scenario-Based Recommendations:

  • If you're a social media influencer or selfie enthusiast: The vivo V21 5G is better, with its superior front camera and OIS stabilization.
  • If you're a hardcore gamer or power user: The Xiaomi Poco X3 GT is a clear winner due to its powerful chipset and 120Hz screen.
  • If you primarily consume media and want vibrant visuals: The vivo V21 5G's AMOLED screen is preferable.
  • If you need all-day battery life and fast charging: The Xiaomi Poco X3 GT will serve you better.
  • If you want a more compact and lighter phone: The vivo V21 5G is a better choice.
  • If you want a more durable phone with better scratch and drop resistance: The Xiaomi Poco X3 GT is better.
  • If you want the most advanced audio experience: The Xiaomi Poco X3 GT has superior audio quality

My Choice

I would choose the Xiaomi Poco X3 GT. While the AMOLED display and front camera on the vivo V21 5G are appealing, my primary needs lean towards performance, battery life, and a high refresh rate for a smoother user experience. The Poco X3 GT's powerful processor ensures it won't lag during multitasking or gaming, and the larger battery coupled with fast charging gives me more flexibility throughout the day. Additionally, the superior audio experience offered by the stereo speakers is a compelling feature for enjoying multimedia content and gaming. While I appreciate the OIS in the front camera and main camera, the trade-off in raw performance and battery life is significant, making the Poco X3 GT a more well-rounded choice for my needs. The better screen protection offered by the Corning Gorilla Glass Victus is also a plus.

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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