Samsung Galaxy S21 5G vs vivo iQOO 12 - Detailed Phone Comparison

Detailed Comparison

Specification

General

Launch Date January 29, 2021 November 14, 2023
Release Year 2021 2023

Physical

Volume 85.33 cm³ 100.33 cm³
Screen Size to Weight Ratio 3.67 "/g 3.42 "/g
Weight 169 g 198.5 g
Height 151.7 mm 163.2 mm
Width 71.2 mm 75.9 mm
Thickness 7.9 mm 8.1 mm
Foldable Design No No
Available Colors
  • Phantom White
  • Phantom Gray
  • Phantom Violet
  • Phantom Pink
  • Black
  • Red
  • White (BMW M branding)

Display

Screen Size 6.2 " 6.78 "
Resolution 1080 x 2400 1260 x 2800
Aspect Ratio 20:9 20:9
Screen-to-Body Ratio 85.9 % 89.6 %
Pixel Density 421 PPI 453 PPI
Refresh Rate 120 Hz 144 Hz
Typical Brightness N/A N/A
HBM Brightness N/A 1400 nits
Peak Brightness 1300 nits 3000 nits

Hardware

Battery Capacity per Screen Area 104.06 mAh/in² 108.77 mAh/in²
Battery Density 46.88 mAh/cm³ 49.83 mAh/cm³
Battery Capacity 4000 mAh 5000 mAh
NFC Support Yes Yes
Chipset Exynos 2100 (5 nm) - International Qualcomm SM8650-AB Snapdragon 8 Gen 3 (4 nm)
CPU Octa-core (1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55) - International Octa-core (1x3.3 GHz Cortex-X4 & 3x3.2 GHz Cortex-A720 & 2x3.0 GHz Cortex-A720 & 2x2.3 GHz Cortex-A520)
GPU Mali-G78 MP14 - International Adreno 750

Connectivity

USB Version 3.2 2.0
OTG Support 1 1
DisplayPort
DisplayPort Version N/A N/A
USB Features USB Type-C 3.2, OTG USB Type-C 2.0, OTG

Software

Operating System Android Android
Initial OS Version 11 14
Maximum OS Version 15 16

Comparison Summary

1. Specifications Comparison

Here's a detailed comparison of the Samsung Galaxy S21 5G and vivo iQOO 12, focusing on practical user experience:

Design

FeatureSamsung Galaxy S21 5Gvivo iQOO 12Practical Impact
Dimensions151.7 × 71.2 × 7.9 mm163.2 × 75.9 × 8.1 mmThe iQOO 12 is noticeably larger and slightly thicker, making it less pocketable but potentially offering a more immersive experience due to the bigger screen.
Weight169g198.5gThe S21 5G is significantly lighter, making it more comfortable for extended single-handed use and less fatiguing to carry around.

Display

FeatureSamsung Galaxy S21 5Gvivo iQOO 12Practical Impact
Size6.2"6.78"The iQOO 12's larger screen is better for media consumption, gaming, and multitasking. The S21 5G is more compact.
Resolution1080x24001260x2800The iQOO 12 has noticeably sharper text and images due to its higher resolution.
PPI421453The iQOO 12 has slightly sharper display, though the difference may not be noticeable to most users.
TechnologyAMOLEDAMOLEDBoth displays offer vibrant colors and deep blacks.
Refresh Rate120Hz144HzThe iQOO 12 offers slightly smoother scrolling and animations.
Brightness1300 nits3000 nitsThe iQOO 12 is dramatically better for outdoor visibility in bright sunlight.

Performance

FeatureSamsung Galaxy S21 5Gvivo iQOO 12Practical Impact
ChipsetExynos 2100 (5 nm)Snapdragon 8 Gen 3 (4 nm)The iQOO 12's newer chip provides significantly faster performance for demanding tasks, smoother gaming, and improved power efficiency.
AnTuTu Score749,1002,020,000The iQOO 12 has significantly superior performance, loading apps faster and handling demanding games with ease.
GPUMali-G78 MP14Adreno 750The iQOO 12's GPU provides noticeably superior graphics performance, offering better gaming experience.

Camera

FeatureSamsung Galaxy S21 5Gvivo iQOO 12Practical Impact
Standard Camera12MP (f/1.8, 1/1.76")50MP (f/1.69, 1/1.3")The iQOO 12's higher resolution and larger sensor should capture more detailed and brighter images, especially in low light.
Telephoto Camera64MP (f/2.0, 1/1.72")NoneThe S21 5G has a dedicated Telephoto camera for zoomed in photos with great quality, whereas the iQOO 12 does not have a dedicated telephoto lens, its telephoto capabilities are covered by its main camera.
Selfie Camera10MP (f/2.2, 1/3.2")16MP (f/2.45, 1/3.1")The iQOO 12 has a higher resolution selfie camera, though the S21 5G has a slightly wider aperture, both can result in good looking selfies.
Telephoto LensNone64MP (f/2.6, 1/2")The iQOO 12 has a dedicated telephoto lens for zoomed images
Wide Angle + Macro12.2MP (f/2.2, 1/2.55")50MP (f/2.0, 1/2.76")The iQOO 12's higher resolution wide angle camera will capture more detail, while the S21 5G's larger sensor might perform slightly better in low light.
VideoUp to 8K@24fpsUp to 8K@30fpsBoth offer high-quality video recording.
DxOMarkMain: 111, Selfie: 132N/AThe S21 5G camera performs fairly well, the iQOO 12 was not tested

Battery

FeatureSamsung Galaxy S21 5Gvivo iQOO 12Practical Impact
Capacity4000mAh5000mAhThe iQOO 12 has a significantly larger battery, likely offering longer battery life.
Charging25W fast charging120W fast chargingThe iQOO 12 has dramatically faster charging times, allowing for quicker power-ups.
Features15W Wireless Charging, Reverse Wireless ChargingNoneThe S21 5G offers wireless and reverse wireless charging for convenience.

Other

FeatureSamsung Galaxy S21 5Gvivo iQOO 12Practical Impact
OSAndroid 11 (Upgradable to 15)Android 14 (Upgradable to 16)The iQOO 12 has a newer operating system and future update potential, providing access to the latest features.
WiFiWi-Fi 6Wi-Fi 7The iQOO 12 supports the latest WiFi standard for faster internet speeds and better performance on supported networks.
Bluetooth5.05.4The iQOO 12 has a newer Bluetooth version with faster and more energy efficient performance.
Storage128/256 GB256/512/1024GBThe iQOO 12 offers significantly more storage, more space for apps, media and large files.
RAM8 GB12/16GBThe iQOO 12 has significantly more RAM, better multitasking capabilities, and more responsive performance.
Expandable StorageNoNoNeither phone supports expandable storage.
AudioDolby Atmos, Stereo Speakers, Noise Cancellation MicrophoneDolby Atmos, Stereo SpeakersThe S21 5G has a Noise Cancellation Microphone for better call quality.
SecurityFingerprint sensorFingerprint sensorBoth have similar fingerprint sensor for security.
Screen ProtectionGorilla Glass VictusUnknownThe S21 5G has confirmed superior screen protection.
SensorsBarometerNoneThe S21 5G has more environmental sensor.

2. Key Differences Analysis

Samsung Galaxy S21 5G Advantages:

  • More Compact and Lighter: Easier to handle and carry around.
  • Wireless Charging: Offers convenient wireless and reverse wireless charging, a feature not present in iQOO 12.
  • Confirmed Superior Screen Protection: Gorilla Glass Victus offers better scratch and shatter resistance.
  • Telephoto camera for zoom: Has a dedicated telephoto camera for zoomed images
  • Noise cancellation microphone: Offers better quality during calls.
  • Additional sensors: Includes a barometer for more precise environmental readings.

Practical Implications: Ideal for users who prioritize portability, convenience of wireless charging, want a solid camera experience for zoomed pictures, and more features for audiophiles.

vivo iQOO 12 Advantages:

  • Significantly Higher Performance: The Snapdragon 8 Gen 3 offers drastically better performance, especially for gaming and demanding tasks.
  • Superior Display: Larger, higher resolution, and dramatically brighter screen offers much better visual experience for all use cases.
  • Much Faster Charging: The 120W charging speed dramatically reduces charging time.
  • Larger Battery: Offers potentially significantly longer battery life.
  • Larger Storage: Offers more space for apps, photos and files.
  • More RAM: Offers better multitasking performance.
  • Newer Software: Has a newer Android version and more future update potential.
  • Newer Wifi Standard: Supports the latest Wifi standards for much faster internet speeds.
  • Dedicated Telephoto Lens: Has a dedicated telephoto camera for zoomed images
  • Latest Bluetooth Version: Has the latest Bluetooth version for more energy efficient experience.

Practical Implications: Ideal for power users, gamers, and those who need long battery life and fast charging.

Trade-offs:

  • S21 5G sacrifices performance, display quality, battery and charging speed for a more compact design and features like wireless charging and a telephoto lens.
  • iQOO 12 is bulkier and lacks wireless charging, but provides a much better experience in performance, display and battery.

3. User Profiles & Recommendations

Samsung Galaxy S21 5G Ideal User:

  • Users who prioritize compactness and portability: Users who want a smaller, lighter phone that is easy to use with one hand and fit into small pockets.
  • Users who value wireless charging: Those who prefer the convenience of wireless and reverse wireless charging options.
  • Users who value a good quality telephoto camera and better audio: Those who prefer a great quality zoom camera, and a better audio experience during calls.

Use Cases: Daily use, casual photography, travel (lighter and more portable), those who prefer a smaller phone, users who prioritize wireless charging, and audiophiles.

vivo iQOO 12 Ideal User:

  • Gamers and Power Users: Those who need the highest possible performance for demanding games and applications.
  • Users who value a premium display and longer battery life: Those who want a large, sharp, and bright screen, with excellent battery and fast charging for an outstanding overall experience.
  • Users who want the latest software and connectivity: Those who value having the newest features with future software upgrades.

Use Cases: Mobile gaming, video editing, media consumption, multitasking, photography and video, and anyone who needs long battery life and the fastest possible charging.

Price-to-Value Ratio:

  • The iQOO 12 offers far superior performance and a much better display, but it will likely be more expensive than an older S21 5G. The S21 5G can be found much cheaper at this point in time. The value is dependent on your priorities.

4. Decision Framework

Key Questions to Consider:

  1. How important is portability and ease of handling to you? (Smaller phone vs. larger)
  2. Do you need the latest hardware for demanding tasks (gaming, intensive apps), and battery performance, or is moderate performance adequate?
  3. Do you use wireless charging frequently, and if you do is it an essential feature?

Scenario-Based Recommendations:

  • Scenario 1: Performance and Display are most important. Choose the vivo iQOO 12. Its superior chipset, display, battery, and charging make it the clear winner for demanding users.

  • Scenario 2: Portability, Wireless Charging and telephoto camera are paramount. Choose the Samsung Galaxy S21 5G. It's lighter, more compact, offers wireless charging, a noise cancelling microphone and a telephoto camera.

  • Scenario 3: Balanced user who is on a tighter budget: Depending on pricing and availability, the S21 5G can offer a great experience for a user that does not need the very best performance, and can benefit from its compact design and wireless charging.

My Choice

Given the specifications and my personal priorities, I would choose the vivo iQOO 12.

Reasoning:

I prioritize performance, display quality, and battery life over the convenience of wireless charging and portability in this comparison. The iQOO 12's significantly superior chipset, larger and higher quality display with higher refresh rate, much larger battery with faster charging, and newer software would provide a significantly better user experience for my specific use cases, which includes mobile gaming, video editing and media consumption, making the trade-off of not having wireless charging worth it. While the S21 5G has a more compact design and confirmed screen protection, the substantial gains in display, performance and battery life offered by the iQOO 12 outweigh these advantages for me. Additionally, the newer WiFi and Bluetooth standards, as well as increased storage and RAM, make it a much more future-proof option.

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.