Samsung Galaxy S21 Ultra 5G vs Oppo Reno12 - Detailed Phone Comparison

Detailed Comparison

Specification

General

Launch Date January 29, 2021 June 25, 2024
Release Year 2021 2024

Physical

Volume 111.09 cm³ 90.89 cm³
Screen Size to Weight Ratio 3 "/g 3.79 "/g
Weight 227 g 177 g
Height 165.1 mm 161.4 mm
Width 75.6 mm 74.1 mm
Thickness 8.9 mm 7.6 mm
Foldable Design No No
Available Colors
  • Phantom Black
  • Phantom Silver
  • Phantom Titanium
  • Phantom Navy
  • Phantom Brown
  • Navy
  • Matte Brown
  • Sunset Pink
  • Astro Silver

Display

Screen Size 6.8 " 6.7 "
Resolution 1440 x 3200 1080 x 2412
Aspect Ratio 20:9 20:9
Screen-to-Body Ratio 89.4 % 90.3 %
Pixel Density 515 PPI 394 PPI
Refresh Rate 120 Hz 120 Hz
Typical Brightness N/A N/A
HBM Brightness N/A N/A
Peak Brightness 1500 nits 1200 nits

Hardware

Battery Capacity per Screen Area 108.13 mAh/in² 111.38 mAh/in²
Battery Density 45.01 mAh/cm³ 55.01 mAh/cm³
Battery Capacity 5000 mAh 5000 mAh
NFC Support Yes Yes
Chipset Exynos 2100 (5 nm) - International Mediatek Dimensity 7300 Energy (4 nm)
CPU Octa-core (1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55) - International Octa-core (4x2.5 GHz Cortex-A78 & 4x2.0 GHz Cortex-A55)
GPU Mali-G78 MP14 - International Mali-G615 MC2

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 17

Comparison Summary

1. Specifications Comparison

Here's a detailed comparison of the Samsung Galaxy S21 Ultra 5G and the Oppo Reno12, focusing on practical implications:

FeatureSamsung Galaxy S21 Ultra 5GOppo Reno12Practical Impact
Design
Dimensions165.1 x 75.6 x 8.9 mm161.4 x 74.1 x 7.6 mmS21 Ultra is larger, bulkier, less pocketable; Reno12 is more ergonomic, easier to handle.
Weight227g177gS21 Ultra feels heavier in hand, may be tiring for long usage; Reno12 is noticeably lighter, more comfortable for extended periods.
Display
Size6.8"6.7"Minimal difference, both offer large screens good for media consumption; S21 Ultra is slightly larger.
Resolution1440 x 32001080 x 2412S21 Ultra has significantly sharper, clearer display with more detail; Reno12 is still sharp, but less so.
PPI515394S21 Ultra display will show finer details, less pixelation; Reno12 is still sharp, but not as crisp.
TechnologyAMOLEDAMOLEDIdentical display tech - both offer vibrant colors, deep blacks.
Refresh Rate120Hz120HzBoth offer smooth scrolling, fluid animations.
Brightness1500 nits1400 nitsS21 Ultra is slightly brighter, better visibility under direct sunlight; both are bright enough for most scenarios.
Performance
ChipsetExynos 2100 (5 nm)Mediatek Dimensity 7300 Energy (4 nm)S21 Ultra offers slightly higher performance for demanding apps, gaming; Reno12 is very capable for everyday use, with good efficiency.
AnTuTu Score749,000702,140S21 Ultra has a small performance edge, noticeable in intensive tasks, gaming; Reno12 performs well in day to day activities.
GPUMali-G78 MP14 (ARM Mali-G78 MC14)Mali-G615 MC2 (Arm Mali-G615 MC2)S21 Ultra may offer superior graphics in gaming and video editing; Reno12 is sufficient for regular mobile gaming.
Camera
Main Camera108MP, f/1.8, 1/1.33"50MP, f/1.8, 1/2"S21 Ultra captures much more detail, performs better in low light; Reno12 is good for everyday snapshots.
Telephoto+Portrait10.8MP, f/2.4, 1/2.65"N/AS21 Ultra offers dedicated zoom capabilities with portrait mode; Reno12 lacks a dedicated telephoto, compromising zoom quality.
Selfie Camera44MP, f/2.2, 1/2.65"32MP, f/2.0S21 Ultra captures more detailed selfies, Reno12 has a slightly wider aperture, performing better in low light.
Telephoto Lens10.8MP, f/4.9, 1/2.65"N/AS21 Ultra offers long-range zoom capabilities, Reno12 doesn't have a dedicated telephoto zoom.
Wide Angle LensN/A8MP, f/2.2, 1/2.8"Reno12 provides an ultrawide perspective for capturing landscapes; S21 Ultra lacks a dedicated wide angle lens.
Macro LensN/A2MP, f/2.4, 1/5"Reno12 enables close-up macro photography; S21 Ultra lacks a dedicated macro lens.
Wide Angle + Macro12.2MP, f/2.2, 1/2.55"N/AS21 Ultra combines both in one lens offering wider perspective for capturing; Reno12 lacks a dedicated wide angle macro lens.
Video Recording8K@24fps, 4K@60fps HDR4K@30fps HDRS21 Ultra offers higher resolution, professional video features; Reno12 provides excellent footage with solid stabilization.
DxoMark MobileMain Score: 115, Photo: 121, Video: 100N/AS21 Ultra has been tested and performs very well, Oppo Reno 12 has no published DxoMark scores.
DxoMark SelfieMain Score: 135, Photo: 133, Video: 140N/AS21 Ultra has been tested and performs very well for selfies, Oppo Reno 12 has no published DxoMark scores.
Battery
Capacity5000 mAh5000 mAhBoth offer similar battery life, likely lasting a full day for moderate usage.
Charging25W fast charging80W fast chargingReno12 charges much faster, reducing downtime; S21 Ultra charging is noticeably slower.
FeaturesWireless, Reverse, No ChargerNon-removableS21 Ultra offers more versatile charging options, but needs separate charger purchase; Reno12 doesn't have wireless.
Software
OSAndroid 11 (up to 15)Android 14 (up to 17)Reno12 ships with the latest Android version, longer future software updates; S21 Ultra will have fewer software updates.
Connectivity
Wi-FiWi-Fi 6Wi-Fi 6Both support latest WiFi standards for fast wireless internet.
BluetoothBluetooth 5.2Bluetooth 5.4Reno12 has newer, more efficient Bluetooth; S21 Ultra offers more variety of protocols, Reno12 comes with LDAC and AAC.
GPSL1+L5, E1+E5aQZSSS21 Ultra supports more precise and accurate GPS tracking in dense cities with more bandwidth, Reno12 comes with QZSS for Japan & Oceania.
SIMDual SIM Dual StandbyDual SIM Dual StandbyBoth support two SIM cards with dual standby.
Storage
Internal128/256/512GB256/512 GBBoth phones offer similar storage options, plenty of space for apps, media.
RAM12GB or 16GB12GB or 16GBBoth phones feature enough RAM for heavy multitasking.
ExpandableNoNoNeither phone offers expandable storage; users must choose the right storage option.
Audio
QualityDolby Atmos, Hi-Res Audio, Stereo SpeakersBasic audio featuresS21 Ultra offers immersive, high quality audio experience, especially for media consumption; Reno12 is basic.
Security
FeaturesFingerprint sensorFingerprint sensorBoth phones offer basic fingerprint biometric security.
Build
ProtectionGorilla Glass VictusGorilla Glass Victus 2Both offer good levels of screen protection; Reno12 uses a slightly newer generation of Gorilla Glass.
Sensors
SensorsCompass, BarometerGravityS21 Ultra has additional sensors for environmental data; Reno12 comes with gravity sensor.

2. Key Differences Analysis

Here's a breakdown of the major advantages and trade-offs for each phone:

Samsung Galaxy S21 Ultra 5G Advantages:

  • Superior Display: Higher resolution and pixel density provide a sharper and more detailed viewing experience.
  • Enhanced Camera System: Offers more versatile photography with a higher resolution main sensor, dedicated telephoto lenses, and 8K video recording.
  • Higher Benchmark Scores: Slightly more processing power for intensive tasks and gaming.
  • Versatile Battery Features: Wireless charging, reverse wireless charging, providing more flexibility.
  • Enhanced Audio Features: Offers Dolby Atmos, Hi-Res Audio, Stereo Speakers and clearer call quality
  • More GPS tracking options: Offers support for more GPS bands and accurate GPS tracking.
  • More Bluetooth protocols: Comes with more Bluetooth protocols for better quality sound.

Oppo Reno12 Advantages:

  • Lighter and More Compact: More comfortable to hold and carry, better for one-handed use.
  • Faster Charging: Significantly quicker charging times, minimizing downtime.
  • Newer Software: Comes with a much newer Android version with more software updates.
  • Wider Selfie Camera: Provides wider aperture on the selfie camera, performing better in low light.
  • Dedicated Wide Angle and Macro Lens: Offers creative and versatile photography options.
  • Newer Bluetooth Version: Bluetooth 5.4 for better efficiency and audio experience.

Significant Trade-offs:

  • S21 Ultra: Heavier, bulkier, slower charging, outdated software.
  • Oppo Reno12: Lower resolution display, less versatile camera system (no telephoto zoom), basic audio experience, lacks some sensors such as barometer and compass.

3. User Profiles & Recommendations

Samsung Galaxy S21 Ultra 5G Ideal Users:

  • Photography Enthusiasts: Users who prioritize high-quality, versatile cameras with telephoto and 8K video recording.
  • Media Consumers: Users who enjoy watching videos, movies, and require a sharp and immersive display.
  • Power Users: Users who perform demanding tasks like gaming or video editing on their phones, needing processing performance and great features.
  • Users who prefer wireless charging: Great for users who prefer the convenience of charging wirelessly or using their phone to charge their accessories.
  • Users who require a great audio experience: Features Dolby Atmos, Hi-Res Audio and Stereo speakers for a much better listening experience.

Use Cases:

  • Professional photography, travel photography, and videography.
  • Watching high-resolution videos, gaming, or content creation.
  • Multitasking with demanding apps, using the phone as a productivity tool.

Oppo Reno12 Ideal Users:

  • Everyday Users: Individuals who need a reliable phone for daily tasks, social media, and casual photography.
  • On-the-Go Users: Those who value portability, light weight and fast charging.
  • Users who prioritize long-term software support: The latest Android version will guarantee better performance and support in the future.
  • Creative photographers: Users who like to take creative and diverse photos with ultrawide and macro capabilities.

Use Cases:

  • Quick, casual photography of everyday moments.
  • Social media browsing, web browsing, and communication.
  • Gaming and media consumption.

Price-to-Value Ratio:

  • The S21 Ultra is generally more expensive, but offers superior specs for those willing to pay.
  • The Reno12 provides excellent value for its price with a balance of key features and performance.

4. Decision Framework

Here are three key questions to help you decide:

  1. Do you prioritize camera quality and versatility, or are you more interested in day to day reliability? If camera quality, display clarity and versatile features is important, the S21 Ultra may be the better choice. If day to day use and reliability is needed, the Reno12 is the better choice.

  2. How important is size and weight for you? If you want a lightweight and portable device, choose the Reno12. If you're okay with a heavier and bulkier phone, choose the S21 Ultra.

  3. Do you prioritize faster charging and future software updates? If fast charging and longer term software support is essential, Reno12 would be the better option. If these are not important, the S21 Ultra can be an option.

Scenario-Based Recommendations:

  • Scenario 1 (Professional Photographer): Choose the Samsung Galaxy S21 Ultra 5G for its advanced camera system, 8K video, and comprehensive features.
  • Scenario 2 (Frequent Traveler): Choose the Oppo Reno12 for its lighter weight, fast charging, and reliable performance for everyday tasks.
  • Scenario 3 (Budget-Conscious User): Choose the Oppo Reno12 for its better value, while still having strong performance, a great screen and great camera quality.

My Choice and Explanation

If I were to choose between these two phones, I would opt for the Oppo Reno12. Here's why:

While the Samsung Galaxy S21 Ultra 5G has several compelling advantages, particularly in its display and camera, the Oppo Reno12 strikes a better balance for my everyday needs. The S21 Ultra's size and weight make it less comfortable for long-term use, and its slower charging is a significant inconvenience in my fast-paced lifestyle. Additionally, the Reno12's newer software means it will receive more updates and be better supported for a longer period.

The Reno12 offers a more practical and user-friendly experience in my opinion. Its lightweight design, faster charging, and more modern OS are key advantages that better align with my daily usage. Though the camera is not as advanced as the S21 Ultra, it's still more than capable for my needs, plus it has dedicated wide angle and macro cameras that the S21 Ultra lacks. For my use case, the trade-offs are acceptable.

Therefore, I would pick the Oppo Reno12 due to its better balance of everyday usability, software longevity, and practicality.

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.

Key Strengths:

  • Mobile technology analysis
  • Digital media communication
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Bridging technical complexity with engaging, accessible narratives.