Samsung Galaxy Note20 Ultra 5G vs Xiaomi Redmi A3 - Detailed Phone Comparison

Detailed Comparison

Specification

General

Launch Date August 21, 2020 February 23, 2024
Release Year 2020 2024

Physical

Volume 103.05 cm³ 106.58 cm³
Screen Size to Weight Ratio 3.32 "/g 3.48 "/g
Weight 208 g 193 g
Height 164.8 mm 168.3 mm
Width 77.2 mm 76.3 mm
Thickness 8.1 mm 8.3 mm
Foldable Design No No
Available Colors
  • Mystic Bronze
  • Mystic Black
  • Mystic White
  • Midnight Black
  • Forest Green (Olive Green)
  • Star Blue (Lake Blue)

Display

Screen Size 6.9 " 6.71 "
Resolution 1440 x 3088 720 x 1650
Aspect Ratio 19.5:9 21:9
Screen-to-Body Ratio 92.5 % 82.9 %
Pixel Density 496 PPI 268 PPI
Refresh Rate 120 Hz 90 Hz
Typical Brightness N/A N/A
HBM Brightness N/A 500 nits
Peak Brightness N/A N/A

Hardware

Battery Capacity per Screen Area 94.52 mAh/in² 111.05 mAh/in²
Battery Density 43.67 mAh/cm³ 46.91 mAh/cm³
Battery Capacity 4500 mAh 5000 mAh
NFC Support Yes Yes
Chipset Exynos 990 (7 nm+) - Global Mediatek Helio G36 (12 nm)
CPU Octa-core (2x2.73 GHz Mongoose M5 & 2x2.50 GHz Cortex-A76 & 4x2.0 GHz Cortex-A55) - Global Octa-core (4x2.2 GHz Cortex-A53 & 4x1.6 GHz Cortex-A53)
GPU Mali-G77 MP11 - Global PowerVR GE8320

Connectivity

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

Software

Operating System Android Android
Initial OS Version 10 14
Maximum OS Version 13

Comparison Summary

1. Specifications Comparison

Design

FeatureSamsung Galaxy Note20 Ultra 5GXiaomi Redmi A3Practical Impact
Dimensions164.8 × 77.2 × 8.1 mm168.3 × 76.3 × 8.3 mmNote20 Ultra 5G is slightly shorter and thinner. The Redmi A3 is slightly taller and wider.
Weight208g193gRedmi A3 is lighter, potentially more comfortable for extended use.
Build Quality (Screen Protection)Corning Gorilla Glass VictusCorning Gorilla Glass 3Note20 Ultra 5G offers significantly better scratch and drop resistance.

Display

FeatureSamsung Galaxy Note20 Ultra 5GXiaomi Redmi A3Practical Impact
Size6.9"6.71"Note20 Ultra 5G has a slightly larger screen for more immersive viewing.
Resolution1440x3088720x1650Note20 Ultra 5G has significantly sharper and more detailed visuals. Text and images will appear much clearer.
PPI496268Note20 Ultra 5G's higher pixel density results in a noticeably sharper display.
TechnologyAMOLEDIPS LCDNote20 Ultra 5G offers superior contrast, deeper blacks, and more vibrant colors, leading to a more visually appealing experience.
Refresh Rate120Hz90HzNote20 Ultra 5G offers slightly smoother scrolling and animations.
Brightness1500 nits0 nitsNote20 Ultra 5G is much more visible outdoors in bright sunlight. Redmi A3 brightness is unknown and may struggle in direct sunlight.

Performance

FeatureSamsung Galaxy Note20 Ultra 5GXiaomi Redmi A3Practical Impact
ChipsetExynos 990 (7 nm+)Mediatek Helio G36 (12 nm)Note20 Ultra 5G has a much more powerful processor, resulting in faster app loading, smoother multitasking, and better gaming performance.
AnTuTu Score666,551127,000Note20 Ultra 5G will handle demanding tasks and games much better and will likely remain usable for longer.
GPUMali-G77 MP11PowerVR GE8320Note20 Ultra 5G's GPU is significantly more powerful, providing a better gaming experience with higher frame rates and better graphics quality.
RAM8 GB or 12 GB3 GB or 4 GB or 6 GBNote20 Ultra 5G can handle more apps running simultaneously without slowing down.

Camera

FeatureSamsung Galaxy Note20 Ultra 5GXiaomi Redmi A3Practical Impact
Main Camera108MP, f/1.88MP, f/2.0Note20 Ultra 5G captures much more detailed photos, especially in good lighting. Wider aperture allows better low-light performance.
Telephoto Lens13MP, f/3.0N/ANote20 Ultra 5G offers optical zoom capabilities for capturing distant subjects with better clarity.
Wide Angle Lens12.2MP, f/2.2N/ANote20 Ultra 5G allows capturing wider scenes in a single shot.
Selfie Camera10MP, f/2.25MP, f/2.2Note20 Ultra 5G captures more detailed and higher-quality selfies.
Video RecordingUp to 8K@24fpsUp to 1080p@30fpsNote20 Ultra 5G can record much higher resolution videos, offering more detail and flexibility for editing.

Battery

FeatureSamsung Galaxy Note20 Ultra 5GXiaomi Redmi A3Practical Impact
Capacity4500mAh5000mAhRedmi A3 may offer slightly longer battery life due to larger capacity.
Charging45W Fast Charging10W Fast ChargingNote20 Ultra 5G charges much faster, reducing downtime.
Wireless ChargingYes (Fast Qi/PMA)NoNote20 Ultra 5G offers the convenience of wireless charging.
Reverse Wireless ChargingYes (9W)NoNote20 Ultra 5G can wirelessly charge other devices, such as earbuds or smartwatches.

2. Key Differences Analysis

Samsung Galaxy Note20 Ultra 5G Advantages:

  • Superior Display: AMOLED, higher resolution, higher refresh rate, and much higher brightness provide a vastly better viewing experience.
  • Significantly More Powerful Performance: The Exynos 990 chipset and more RAM allow for smoother multitasking, better gaming, and overall faster performance.
  • Versatile and Higher-Quality Camera System: Includes telephoto and ultrawide lenses, higher resolution sensors, and advanced video recording capabilities.
  • Faster Charging and Wireless Charging: Offers faster wired charging and the convenience of wireless and reverse wireless charging.
  • eSIM Support: Added flexibility for cellular plans.
  • Better Build Quality: Corning Gorilla Glass Victus provides superior screen protection.

Xiaomi Redmi A3 Advantages:

  • Potentially Longer Battery Life: The larger battery capacity may result in slightly longer battery life.
  • Newer Android Version at Launch: Launched with Android 14.
  • Lighter Weight: May be more comfortable to hold for extended periods.
  • Side-Mounted Fingerprint Sensor: Some users prefer side-mounted fingerprint sensors.
  • Lower Price: The Redmi A3 is significantly more affordable, making it accessible to budget-conscious consumers.

Trade-offs:

  • Note20 Ultra 5G: Higher price, older software (though upgradable).
  • Redmi A3: Significantly lower performance, inferior display, and less capable camera system.

3. User Profiles & Recommendations

Samsung Galaxy Note20 Ultra 5G:

  • Ideal User: Power users who demand high performance, a premium display, a versatile camera system, and fast charging.
  • Use Cases:
    • Mobile gaming
    • Photography and videography
    • Productivity tasks (multitasking, document editing)
    • Media consumption (streaming movies, browsing)

Xiaomi Redmi A3:

  • Ideal User: Budget-conscious consumers who prioritize affordability and acceptable battery life over performance and advanced features.
  • Use Cases:
    • Basic communication (calls, texts, emails)
    • Simple web browsing
    • Social media
    • Light media consumption

4. Decision Framework

Key Questions for Buyers:

  1. What is your budget? The price difference is substantial.
  2. How important are performance and display quality to you? If you prioritize these, the Note20 Ultra 5G is the clear choice.
  3. What are your primary use cases? If you only need basic smartphone functionality, the Redmi A3 might suffice.

Scenario-Based Recommendations:

  • Scenario 1: Mobile Gamer/Photographer: Choose the Samsung Galaxy Note20 Ultra 5G. The superior performance, display, and camera justify the higher price.
  • Scenario 2: Budget-Conscious User Needing Basic Functionality: Choose the Xiaomi Redmi A3. It provides essential smartphone features at a very affordable price.
  • Scenario 3: Moderate User Prioritizing Balance: The user should consider other options in the market that offer a better balance of features and price than either of these phones. Given the age of the Note 20 Ultra 5G, there are likely better-value options available now.

What I Would Choose and Why

If I were personally choosing between these two phones, I would choose the Samsung Galaxy Note20 Ultra 5G, despite it being an older model. The sheer difference in performance, display quality, and camera capabilities is simply too significant to ignore. While the Redmi A3 has a newer operating system, a slightly larger battery, and a lighter build, these advantages do not outweigh the vastly superior user experience offered by the Note20 Ultra 5G. As someone who values smooth multitasking, high-quality visuals, and versatile photography options, the Note20 Ultra 5G is the better choice, especially when it can be found for a discounted price in the used market.

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.