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

Detailed Comparison

Specification

General

Launch Date September 8, 2020 May 6, 2021
Release Year 2020 2021

Physical

Volume 119.33 cm³ 86.15 cm³
Screen Size to Weight Ratio 3.1 "/g 3.66 "/g
Weight 215 g 176 g
Height 165.3 mm 159.7 mm
Width 76.8 mm 73.9 mm
Thickness 9.4 mm 7.3 mm
Foldable Design No No
Available Colors
  • Cobalt Blue
  • Shadow Gray
  • Arctic White
  • Dusk Blue
  • Sunset Dazzle

Display

Screen Size 6.67 " 6.44 "
Resolution 1080 x 2400 1080 x 2400
Aspect Ratio 20:9 20:9
Screen-to-Body Ratio 84.6 % 84.8 %
Pixel Density 395 PPI 409 PPI
Refresh Rate 120 Hz 90 Hz
Typical Brightness 450 nits 500 nits
HBM Brightness N/A N/A
Peak Brightness N/A N/A

Hardware

Battery Capacity per Screen Area 115.98 mAh/in² 96.45 mAh/in²
Battery Density 43.24 mAh/cm³ 46.43 mAh/cm³
Battery Capacity 5160 mAh 4000 mAh
NFC Support Yes Yes
Chipset Qualcomm SM7150-AC Snapdragon 732G (8 nm) Mediatek Dimensity 800U (7 nm)
CPU Octa-core (2x2.3 GHz Kryo 470 Gold & 6x1.8 GHz Kryo 470 Silver) Octa-core (2x2.4 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55)
GPU Adreno 618 Mali-G57 MC3

Connectivity

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

Software

Operating System Android Android
Initial OS Version 10 11
Maximum OS Version 12

Comparison Summary

1. Specifications Comparison

FeatureXiaomi Poco X3 NFCvivo V21 5GPractical Impact
Design
Dimensions165.3 × 76.8 × 9.4 mm159.7 × 73.9 × 7.3 mmPoco X3 NFC is larger and thicker, less pocketable. V21 5G is slimmer and easier to handle.
Weight215g176gPoco X3 NFC feels heavier, potentially causing fatigue during extended use. V21 5G is more comfortable for prolonged use.
Build Quality (Screen)Corning Gorilla Glass 5UnknownPoco X3 NFC offers better screen protection against scratches and drops.
Display
Size6.67"6.44"Poco X3 NFC provides a slightly larger viewing area, better for media consumption.
TechnologyIPS LCDAMOLEDV21 5G offers richer colors, deeper blacks, and better contrast, improving the visual experience.
Refresh Rate120Hz90HzPoco X3 NFC has smoother scrolling and animations, enhancing the perceived responsiveness, especially in gaming.
Performance
ChipsetQualcomm Snapdragon 732G (8 nm)Mediatek Dimensity 800U (7 nm)V21 5G chipset is slightly more powerful based on AnTuTu scores.
AnTuTu Score328,145343,150V21 5G is likely to offer slightly smoother performance in demanding tasks and gaming.
Camera
Main Camera64MP, f/1.89, Sony IMX68264MP, f/1.79V21 5G slightly wider aperture (f/1.79 vs f/1.89) may result in better low-light performance.
Ultrawide Camera13MP, f/2.28MP, f/2.2Poco X3 NFC captures more detailed ultrawide photos.
Selfie Camera20MP, f/2.244MP, f/2.0V21 5G takes significantly higher-resolution and potentially better quality selfies, especially in low light.
Video StabilizationEISOISV21 5G (OIS) offers superior video stabilization, resulting in smoother videos, especially in shaky conditions.
Battery
Capacity5160mAh4000mAhPoco X3 NFC provides significantly longer battery life, reducing the need for frequent charging.
Charging33W33WBoth phones charge at the same speed.
Software
OSAndroid 10 (Upgradable to 12)Android 11V21 5G starts with a newer Android version.
Storage
Internal64/128 GB128/256 GBV21 5G offers more storage options, useful for users with large media libraries.
Expandable StorageNoNoNeither phone allows for storage expansion.
Audio
Audio QualityStereo Speakers, Noise CancellationBasicPoco X3 NFC offers better audio quality for media consumption and clearer calls.
Security
Fingerprint SensorSide-mountedBasicSide-mounted sensor on the Poco X3 NFC is often faster and more convenient.

2. Key Differences Analysis

Xiaomi Poco X3 NFC Advantages:

  • Larger Battery: Significantly longer battery life for all-day usage. Practical Impact: Less frequent charging, ideal for users on the go.
  • Larger Display: A slightly larger screen provides a more immersive viewing experience. Practical Impact: Better for watching videos and playing games.
  • 120Hz Refresh Rate: Smoother scrolling and animations. Practical Impact: Enhances the perceived responsiveness, especially in gaming and UI navigation.
  • Stereo Speakers: Better audio quality for media consumption. Practical Impact: More immersive sound for games, videos, and music.
  • Screen Protection: Corning Gorilla Glass 5. Practical Impact: Better scratch and drop resistance.
  • Ultrawide Camera: Higher Resolution Ultrawide Camera. Practical Impact: Better detailed landscape photography.

vivo V21 5G Advantages:

  • Lighter and Thinner: More comfortable to hold and carry. Practical Impact: Easier to use one-handed and fits better in pockets.
  • AMOLED Display: Superior display technology with vibrant colors and deep blacks. Practical Impact: Better viewing experience for photos, videos, and games.
  • Better Selfie Camera: Higher resolution and wider aperture. Practical Impact: Superior selfie quality, especially in low light.
  • Optical Image Stabilization (OIS): Superior video stabilization. Practical Impact: Smoother and more stable videos, especially in shaky conditions.
  • Newer Android Version: Ships with a more recent version of Android. Practical Impact: Potentially longer software support.
  • Slightly more powerful: Slightly better scores in benchmarks. Practical Impact: Faster performance in demanding tasks and gaming.
  • More Internal Storage: Options for more internal storage. Practical Impact: Larger capacity to hold more files.

Trade-offs:

  • Poco X3 NFC trades portability and display quality for battery life and smoother display.
  • vivo V21 5G trades battery life and audio quality for a more premium display and better camera.

3. User Profiles & Recommendations

Xiaomi Poco X3 NFC Ideal User:

  • Gamers: The 120Hz refresh rate and larger battery are great for long gaming sessions.
  • Budget-conscious users: Prioritizes features over premium design.
  • Users who prioritize battery life: Needs a phone that can last all day without needing a charge.
  • Students: Can take advantage of the good screen and battery life for studying and entertainment.

Use Cases:

  • Playing mobile games for extended periods.
  • Watching videos and movies on the go.
  • Taking casual photos and videos.

vivo V21 5G Ideal User:

  • Selfie enthusiasts: Prioritizes high-quality selfies and video calls.
  • Users who value aesthetics: Appreciates a slim and stylish design.
  • Content creators: Needs a good camera for photos and videos.
  • Social media users: Wants a phone that can capture and share high-quality content.

Use Cases:

  • Taking high-quality selfies and group photos.
  • Recording stable videos for social media.
  • Enjoying media content with vibrant colors and deep blacks.

4. Decision Framework

Key Questions for Buyers:

  1. How important is battery life to you? If you need a phone that can last all day, the Poco X3 NFC is the better choice.
  2. Do you prioritize camera quality, especially selfies and video stabilization? If so, the vivo V21 5G is the better option.
  3. Do you prefer a larger display and smoother scrolling, or a slimmer, more portable design with a vibrant AMOLED screen? This is a trade-off between the Poco X3 NFC and the vivo V21 5G.

Scenario-Based Recommendations:

  • Scenario 1: You are a student on a budget who needs a phone for online classes, media consumption, and casual gaming. Recommendation: Xiaomi Poco X3 NFC. The larger screen, long battery life, and smooth refresh rate make it ideal for these tasks.
  • Scenario 2: You are a social media influencer who needs a phone with a great selfie camera and good video stabilization. Recommendation: vivo V21 5G. The high-resolution selfie camera and OIS provide the best results for content creation.
  • Scenario 3: You are a frequent traveler who needs a phone that is lightweight and takes good photos and videos. Recommendation: vivo V21 5G.

My Choice

If I had to choose between these two phones, I would pick the vivo V21 5G. While the larger battery and smoother refresh rate of the Poco X3 NFC are appealing, the superior AMOLED display, better selfie camera, and OIS for video recording of the V21 5G are more important to me. I prioritize camera quality and overall visual experience, and the V21 5G delivers on those fronts. Also, the lighter and slimmer design is a definite plus for portability.

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.