Samsung Galaxy S21 Ultra 5G vs Oppo Reno7 - Detailed Phone Comparison

Detailed Comparison

Specification
Oppo Reno7
Oppo Reno7
Oppo

General

Launch Date January 29, 2021 April 2, 2022
Release Year 2021 2022

Physical

Volume 111.09 cm³ 87.79 cm³
Screen Size to Weight Ratio 3 "/g 3.67 "/g
Weight 227 g 175 g
Height 165.1 mm 159.9 mm
Width 75.6 mm 73.2 mm
Thickness 8.9 mm 7.5 mm
Foldable Design No No
Available Colors
  • Phantom Black
  • Phantom Silver
  • Phantom Titanium
  • Phantom Navy
  • Phantom Brown
  • Navy
  • Cosmic Black
  • Sunset Orange

Display

Screen Size 6.8 " 6.43 "
Resolution 1440 x 3200 1080 x 2400
Aspect Ratio 20:9 20:9
Screen-to-Body Ratio 89.4 % 85.3 %
Pixel Density 515 PPI 409 PPI
Refresh Rate 120 Hz 90 Hz
Typical Brightness N/A 430 nits
HBM Brightness N/A 600 nits
Peak Brightness 1500 nits 800 nits

Hardware

Battery Capacity per Screen Area 108.13 mAh/in² 108.84 mAh/in²
Battery Density 45.01 mAh/cm³ 51.26 mAh/cm³
Battery Capacity 5000 mAh 4500 mAh
NFC Support Yes Yes
Chipset Exynos 2100 (5 nm) - International Qualcomm SM6225 Snapdragon 680 4G (6 nm)
CPU Octa-core (1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55) - International Octa-core (4x2.4 GHz Kryo 265 Gold & 4x1.9 GHz Kryo 265 Silver)
GPU Mali-G78 MP14 - International Adreno 610

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 12
Maximum OS Version 15 14

Comparison Summary

1. Specifications Comparison

Here's a detailed comparison of the Samsung Galaxy S21 Ultra 5G and Oppo Reno7, focusing on practical implications:

Design

FeatureSamsung Galaxy S21 Ultra 5GOppo Reno7Practical Impact
Dimensions165.1 × 75.6 × 8.9 mm159.9 × 73.2 × 7.5 mmS21 Ultra is larger and bulkier, potentially less comfortable for one-handed use and pocketing.
Weight227g175gS21 Ultra is significantly heavier, which may be a drawback for extended use. Reno7 is much easier to carry and use for extended periods.

Display

FeatureSamsung Galaxy S21 Ultra 5GOppo Reno7Practical Impact
Size6.8"6.43"S21 Ultra offers a larger screen for more immersive media consumption, gaming, and multitasking.
Resolution1440x32001080x2400S21 Ultra's higher resolution results in sharper images, text, and overall visual clarity.
PPI515409S21 Ultra's higher pixel density makes the display noticeably sharper, reducing pixelation.
TechnologyAMOLEDAMOLEDBoth offer vibrant colors, deep blacks, and excellent contrast ratios.
Refresh Rate120Hz90HzS21 Ultra's 120Hz refresh rate provides smoother scrolling and animations.
Brightness1500 nits800 nitsS21 Ultra is significantly brighter, offering superior outdoor visibility in direct sunlight.

Performance

FeatureSamsung Galaxy S21 Ultra 5GOppo Reno7Practical Impact
ChipsetExynos 2100 (5 nm)Qualcomm Snapdragon 680 4G (6 nm)S21 Ultra's chipset offers substantially better performance for gaming, multitasking, and demanding applications.
AnTuTu Score749,000249,000S21 Ultra provides significantly faster app loading, smoother multitasking, and superior gaming.
GPUMali-G78 MP14Adreno 610S21 Ultra's GPU provides better graphical performance, leading to smoother gaming and video playback.

Battery

FeatureSamsung Galaxy S21 Ultra 5GOppo Reno7Practical Impact
Capacity5000mAh4500mAhS21 Ultra has a larger battery, likely providing longer battery life.
Charging25W fast charging33W fast chargingReno7 charges faster, reducing downtime.
FeaturesReverse charging, Wireless charging 15W, Reverse wireless charging 9W, No charger in-boxNon-removableS21 Ultra offers convenient wireless charging and reverse charging for accessories, but lacks an in-box charger.

Camera

FeatureSamsung Galaxy S21 Ultra 5GOppo Reno7Practical Impact
Main Camera108MP, f/1.8, 1/1.33"64MP, f/1.7S21 Ultra captures more detail, has a larger sensor for better low-light performance. Reno7 has a slightly wider aperture for better low-light performance
Telephoto + Portrait Camera10.8MP, f/2.4, 1/2.65"Not AvailableS21 Ultra offers optical zoom capabilities for detailed close ups.
Selfie Camera44MP, f/2.2, 1/2.65"32MP, f/2.4, 1/2.74"S21 Ultra takes higher resolution selfies with slightly wider aperture for brighter images.
Telephoto Lens10.8MP, f/4.9, 1/2.65"Not AvailableS21 Ultra offers a dedicated telephoto lens for more zoom options.
Macro LensNot Available2MP, f/3.4Reno7 offers a macro lens for extreme close-up shots.
Wide Angle + Macro12.2MP, f/2.2, 1/2.55"Not AvailableS21 Ultra offers a dedicated ultrawide lens for expansive shots with additional macro function.
Black & WhiteNot Available2MP, f/2.4Reno7 provides an extra lens for black and white photography.
Video8K@24fps, 4K@60fps with HDR, EIS, Stereo Sound1080p@30fps with EISS21 Ultra can record much higher resolution and quality videos, offering HDR and 8K recording with EIS and stereo sound.
DXOMark (Mobile)Main: 115, Photo: 121, Video: 100Not AvailableS21 Ultra's camera performance is officially measured and verified for picture and video taking capabilities.
DXOMark (Selfie)Main: 135, Photo: 133, Video: 140Not AvailableS21 Ultra's front facing camera performance is officially measured and verified for picture and video taking capabilities.

2. Key Differences Analysis

Samsung Galaxy S21 Ultra 5G Advantages:

  • Superior Performance: The Exynos 2100 chipset offers significantly faster processing, smoother multitasking, and superior gaming performance.
  • Better Display: Larger, higher resolution screen with a 120Hz refresh rate and much higher brightness for superior visuals.
  • Advanced Camera System: Multiple telephoto lenses, higher resolution main and selfie cameras, and advanced video recording capabilities including 8K and HDR
  • Wireless Charging: Includes wireless and reverse wireless charging, adding more convenience.
  • More RAM: 12/16GB vs 8GB for superior multitasking and smoother operation.
  • Higher quality audio: Includes Dolby Atmos, Hi-Res Audio and Stereo speakers

Oppo Reno7 Advantages:

  • Lighter and More Compact: More comfortable for one-handed use, pocketable, and less tiring to hold.
  • Faster Charging: 33W fast charging allows quicker charging times.
  • Macro Lens: Dedicated macro lens for extreme close-up photography.
  • Black and white lens: Added lens for specific black and white photography.
  • Newer OS: Comes with a newer version of Android (Android 12)

Trade-offs:

  • The S21 Ultra trades a larger, heavier design and slower wired charging speed for significantly superior performance, display, and camera capabilities.
  • The Reno7 trades top-tier performance and camera quality for a lighter, more compact design, faster charging and macro/black and white lenses.

3. User Profiles & Recommendations

Samsung Galaxy S21 Ultra 5G Ideal User:

  • Power Users: Individuals who demand top-tier performance for gaming, multitasking, and demanding applications.
  • Photography Enthusiasts: Users who prioritize camera quality, optical zoom, and advanced video capabilities.
  • Media Consumers: Users who want a large, high-resolution, bright, and smooth display for watching videos and gaming.
  • Professionals: Users needing top-tier performance, wireless charging, and advanced camera capabilities.

Use Cases for S21 Ultra 5G:

  • Professional-grade photography and videography.
  • Mobile gaming on demanding titles.
  • Heavy multitasking between multiple applications.
  • Outdoor usage in bright sunlight.

Oppo Reno7 Ideal User:

  • Casual Users: Individuals who prioritize a lightweight, compact phone for everyday use.
  • Budget-Conscious Buyers: Those seeking a balanced phone with a decent display and camera at a more affordable price.
  • Users who prefer faster charging Those seeking a quicker charging experience.
  • Users looking for a macro and black and white lens Those who like these lenses for niche photography use cases.

Use Cases for Reno7:

  • Daily communication, social media, and browsing.
  • Casual photography and video recording.
  • Comfortable one-handed use for on the go tasks.
  • Quick charging for minimal downtime.

Price-to-Value Ratio:

  • The S21 Ultra offers premium features and performance but comes at a higher price point.
  • The Reno7 provides a good balance of features at a more affordable price, making it a better value for budget-conscious buyers.

4. Decision Framework

Here are three key questions for buyers to consider:

  1. What is your primary use case for your phone?
    • Scenario: If you need a powerhouse for gaming or professional photography, the S21 Ultra is the better choice. If you prioritize a lightweight phone for casual use, the Reno7 is more suitable.
  2. How important is display quality?
    • Scenario: If a vibrant, sharp, bright display with smooth scrolling is crucial, the S21 Ultra is a clear winner. If a decent display is enough, the Reno7 suffices.
  3. How much do you value performance versus portability and charging?
    • Scenario: If you want the best performance and don't mind a heavier device, go for the S21 Ultra. If you want a lighter phone with faster charging and don't need top-tier performance, go for the Reno7.

My Choice and Why

Based on the detailed comparison, I would choose the Samsung Galaxy S21 Ultra 5G.

Here's why:

  1. Superior Overall Performance: The Exynos 2100 chipset and ample RAM translate to a significantly smoother and faster user experience. This is crucial for my usage, which includes demanding applications and gaming.
  2. Exceptional Display Quality: The larger, higher resolution, 120Hz display with its incredible brightness is a game-changer for media consumption and provides an immersive experience which is very important for me.
  3. Versatile Camera System: As someone who enjoys mobile photography, the S21 Ultra's advanced camera system, especially the telephoto and video capabilities, would be invaluable. The significantly better photo and video scores on DXOMark, show that the Samsung is superior.
  4. Better audio quality: The Dolby Atmos, Hi-Res Audio and stereo speakers provide a far better audio experience than the Reno7.
  5. Features: the additional features provided such as wireless and reverse wireless charging, as well as more sensors, makes the S21 Ultra an overall superior product.

While the Oppo Reno7 is a more affordable option, its compromise in performance, display, and camera does not justify the lower price for my specific needs and preferences. The S21 Ultra's premium features make it worth the additional cost. Even though the S21 Ultra is older, the much better specifications make it a far better choice.

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
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Bridging technical complexity with engaging, accessible narratives.