Samsung Galaxy S21+ 5G vs Samsung Galaxy S24 Ultra - Detailed Phone Comparison

Detailed Comparison

Specification

General

Launch Date January 29, 2021 January 24, 2024
Release Year 2021 2024

Physical

Volume 95.23 cm³ 110.27 cm³
Screen Size to Weight Ratio 3.35 "/g 2.93 "/g
Weight 200 g 232 g
Height 161.5 mm 162.3 mm
Width 75.6 mm 79 mm
Thickness 7.8 mm 8.6 mm
Foldable Design No No
Available Colors
  • Phantom Violet
  • Phantom Pink
  • Phantom Black
  • Phantom Silver
  • Phantom Gold
  • Phantom Red
  • Titanium Gray
  • Titanium Blue
  • Titanium Black
  • Titanium Violet
  • Titanium Yellow
  • Titanium Green
  • Titanium Orange

Display

Screen Size 6.7 " 6.8 "
Resolution 1080 x 2400 1440 x 3120
Aspect Ratio 20:9 19.5:9
Screen-to-Body Ratio 88.8 % 88.5 %
Pixel Density 394 PPI 505 PPI
Refresh Rate 120 Hz 120 Hz
Typical Brightness N/A N/A
HBM Brightness N/A N/A
Peak Brightness 1300 nits 2600 nits

Hardware

Battery Capacity per Screen Area 106.93 mAh/in² 108.13 mAh/in²
Battery Density 50.4 mAh/cm³ 45.34 mAh/cm³
Battery Capacity 4800 mAh 5000 mAh
NFC Support Yes Yes
Chipset Exynos 2100 (5 nm) - International Qualcomm SM8650-AC 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 8-core (1x3.39GHz Cortex-X4 & 3x3.1GHz Cortex-A720 & 2x2.9GHz Cortex-A720 & 2x2.2GHz Cortex-A520)
GPU Mali-G78 MP14 - International Adreno 750 (1 GHz)

Connectivity

USB Version 3.2 3.2
OTG Support 1 1
DisplayPort 1
DisplayPort Version N/A 1.2
USB Features USB Type-C 3.2, OTG USB Type-C 3.2, OTG, DisplayPort 1.2

Software

Operating System Android Android
Initial OS Version 11 14
Maximum OS Version 15 21

Comparison Summary

1. Specifications Comparison

Design

FeatureSamsung Galaxy S21+ 5GSamsung Galaxy S24 UltraPractical Impact
Launch Date2021-01-292024-01-24S24 Ultra is significantly newer, with updated features and software.
Form FactorStandardStandardBoth are standard smartphones, no folding or unique form factor.
Dimensions161.5 x 75.6 x 7.8 mm162.3 x 79 x 8.6 mmS24 Ultra is slightly larger and thicker, may be less comfortable for smaller hands.
Weight200g232gS21+ 5G is significantly lighter; S24 Ultra may feel heavy during extended use.

Display

FeatureSamsung Galaxy S21+ 5GSamsung Galaxy S24 UltraPractical Impact
Size6.7"6.8"Negligible difference in screen size, both offer immersive viewing experiences.
Resolution1080x24001440x3120S24 Ultra has a much sharper display with finer details; text and images appear crisper.
PPI394505S24 Ultra offers significantly higher pixel density, resulting in a sharper, more detailed display.
TechnologyAMOLEDMissingS21+ 5G has AMOLED display offering vibrant colours and better contrast. S24 Ultra missing spec
Refresh Rate120Hz120HzBoth offer smooth scrolling and animations, making the experience fluid.
Brightness1300 nits2600 nitsS24 Ultra is much brighter, making it significantly better for outdoor use in direct sunlight.

Performance

FeatureSamsung Galaxy S21+ 5GSamsung Galaxy S24 UltraPractical Impact
ChipsetExynos 2100 (5 nm) - InternationalQualcomm SM8650-AC Snapdragon 8 Gen 3 (4 nm)S24 Ultra has a newer, more powerful chipset, leading to better overall performance and efficiency.
AnTuTu Score749,1001,814,869S24 Ultra's benchmark score indicates drastically faster performance, making it suitable for gaming and heavy tasks
GPUMali-G78 MP14 - International (ARM Mali-G78 MC14)Adreno 750 (1 GHz) (Adreno 750)S24 Ultra has a superior GPU, resulting in better graphics performance for gaming and demanding apps.

Camera

FeatureSamsung Galaxy S21+ 5GSamsung Galaxy S24 UltraPractical Impact
Main Camera12MP, f/1.8, 1/1.76", 1.8µm (Sony IMX555)200MP, f/1.7, 1/1.3", 1.0µm (Samsung ISOCELL HP2)S24 Ultra captures significantly more detail, larger sensor for better low-light performance.
Telephoto/Portrait64MP, f/2.0, 1/1.72", 0.8µm (Samsung Bright S5KGW2)50MP, f/2.4, 1/1.56", 1.0µm (Sony IMX854)S24 Ultra has slightly larger sensor; S21+ 5G has better aperture for low light. S24 Ultra has better telephoto detail
Selfie10MP, f/2.2, 1/3.2", 1.22µm (Sony IMX374)12MP, f/2.2, (Samsung S5K3LU) Missing µmS24 Ultra slightly better resolution, overall selfie picture quality similar.
Telephoto LensNone10MP, f/3.4, 1/3.52", 1.12µm (Sony IMX754)S24 Ultra offers dedicated telephoto lens for zoomed shots.
Wide Angle LensNone12.2MP, f/2.2, 1/2.55", 1.40µm (Sony IMX564)S24 Ultra provides wider field of view for landscape shots and group photos.
Wide Angle + Macro Lens12.2MP, f/2.2, 1/2.55", 1.40µm (Sony IMX563)NoneS21+ 5G offers dedicated macro lens.
Video RecordingUp to 8K@24fps, 4K@60fps, various 1080p and 720p.Up to 8K@30fps, 4K@120fps, various 1080p.S24 Ultra offers more flexibility for high-resolution recording with 4K@120fps.
DxOMarkMain: 111, Photo: 118, Video: 89Main: 144, Photo: 144, Video: 137S24 Ultra has significantly better image quality and video performance according to DxOMark scores.

Battery

FeatureSamsung Galaxy S21+ 5GSamsung Galaxy S24 UltraPractical Impact
Capacity4800mAh5000mAhS24 Ultra offers slightly longer battery life, but difference might not be noticeable for most users.
Charging25W Fast Charging45W Fast ChargingS24 Ultra charges significantly faster, reducing time spent tethered to a charger.
FeaturesReverse, 15W Wireless, 4.5W Reverse Wireless, No charge in-boxBypass, Reverse, 15W Wireless, 4.5W Reverse WirelessBoth offer similar charging capabilities, with slight variations.

Other Features

FeatureSamsung Galaxy S21+ 5GSamsung Galaxy S24 UltraPractical Impact
OSAndroid 11, Upgradable to 15Android 14, Upgradable to 21S24 Ultra has a newer OS and longer software support, ensuring the latest features.
Wi-FiWi-Fi 6Wi-Fi 6ES24 Ultra has access to the 6GHz band and supports Wi-Fi MiMO, providing faster speeds and less interference.
BluetoothBluetooth 5.0Bluetooth 5.3S24 Ultra has improved Bluetooth features, supporting newer LDAC codec.
GPSGPS (L1+L5), Galileo (E1+E5a)GPS (L1+L5), GLONASS (L1), BeiDou (B1), Galileo (E1+E5a), QZSS (L1 + L5)S24 Ultra has wider GPS support, offering better location accuracy.
SIMDual SIM Dual Standby (Nano SIM + Nano SIM / eSIM)Dual SIM Dual Standby (Nano SIM / eSIM + Nano SIM / eSIM)Both support Dual SIM and eSIM, providing flexibility for different network usage.
Storage128 GB / 256 GB256 GB / 512 GB / 1024 GBS24 Ultra provides more internal storage, eliminating the need for external storage.
RAM8 GB12 GBS24 Ultra offers significantly smoother multitasking and improved performance with more memory.
Expandable StorageNoNoNeither phone offers expandable storage, making the internal storage choices important.
AudioDolby Atmos, Hi-Res AudioMissing specS21+ 5G has better audio quality and features with Dolby Atmos and Hi-Res Audio, S24 Ultra has missing specification
Build QualityGorilla Glass VictusGorilla Glass ArmorS24 Ultra has superior protection
SecurityFingerprint sensorFingerprint sensorBoth phones have basic fingerprint sensor for biometric security
SensorsBiometric, Proximity, Motion, EnvironmentalBiometric, Proximity, Motion, EnvironmentalComprehensive sensor suites suitable for advanced features and gaming for both phones

2. Key Differences Analysis

Samsung Galaxy S21+ 5G Advantages:

  • Lighter Weight: Significantly lighter (32g), making it more comfortable for extended use.
  • Audio Features: Enhanced audio features with Dolby Atmos and Hi-Res Audio.
  • Dedicated Macro Lens: Provides a specific lens for close-up photography.

Practical Implications:

  • The lighter weight makes it more portable.
  • The advanced audio features give an edge for content consumption, music, and calls.

Samsung Galaxy S24 Ultra Advantages:

  • Significantly Newer & Faster Processor: Snapdragon 8 Gen 3 offers drastically superior performance, better multitasking, faster app launches, and smoother gaming.
  • Sharper & Brighter Display: Much higher resolution, pixel density and brightness results in clearer, more vibrant visuals, especially in bright outdoor conditions.
  • Superior Camera System: 200MP main camera, dedicated telephoto lens, and wide-angle lens, provide more versatility and better overall image quality. Much higher DxOMark Scores show better photo and video capabilities.
  • Larger Battery with Faster Charging: Larger capacity coupled with 45W charging results in longer usage and quicker recharge times.
  • More RAM and Storage: 12GB of RAM offers smoother multitasking; greater storage options available, removing storage concerns.
  • Advanced Connectivity: Wi-Fi 6E and Bluetooth 5.3 provide faster and more reliable connections, along with more accurate GPS and location services.
  • Longer Software Support: Receives updates longer, meaning it will have more features and be more secure over its life.

Practical Implications:

  • The faster processor allows for a better experience for games and resource-heavy tasks.
  • The display is noticeably sharper and brighter for outdoor use.
  • The camera provides better overall image and video quality, making it the better choice for content creation.
  • The improved connectivity can make data transfer faster and more efficient.

Significant Trade-offs:

  • Weight & Size: The S24 Ultra is larger, thicker, and heavier, which may not appeal to users who want a lighter, more compact device.
  • Cost: The S24 Ultra is significantly more expensive than the S21+ 5G.
  • Audio: S24 Ultra does not explicitly list Dolby Atmos or Hi-Res Audio, may impact audio quality for some users.

3. User Profiles & Recommendations

Ideal User for Samsung Galaxy S21+ 5G:

  • Budget-Conscious Users: Those looking for good performance at a lower price point.
  • Everyday Users: Individuals who prioritize a lighter device, and do not engage in heavy tasks, such as intense gaming.
  • Audio Enthusiasts: Users who value Dolby Atmos and Hi-Res Audio features for enhanced audio experiences.

Specific Use Cases:

  • Casual Social Media Use: Browsing social media, watching videos.
  • Everyday Photography: Taking occasional photos for social media.
  • Listening to Music: Enjoying audio content with Hi-Res Audio support and stereo speakers.

Ideal User for Samsung Galaxy S24 Ultra:

  • Power Users: Those who require top-tier performance for demanding tasks like gaming and video editing.
  • Photography/Videography Enthusiasts: Users who prioritize camera quality and versatility.
  • Professional Users: Those requiring a device that can handle demanding tasks and offer long-term software support.
  • Those Seeking Best of the Best: Those willing to pay for the best performance and features available.

Specific Use Cases:

  • High-End Mobile Gaming: Playing graphics-intensive games at the highest settings.
  • Professional Photography and Videography: Capturing high-quality photos and videos for professional use.
  • Heavy Multitasking: Running multiple applications at the same time.
  • Long-term Use: Benefiting from the latest software features and security updates for years.

Price-to-Value Ratio:

  • S21+ 5G: Offers good value for users looking for reliable performance at a mid-range price.
  • S24 Ultra: Premium price point is justified for users who need the best specs and features available, providing top-tier performance and camera capabilities.

4. Decision Framework

Key Questions to Consider:

  1. Budget: How much are you willing to spend on a new smartphone?
  2. Primary Use Cases: What are your most frequent activities when using your phone?
  3. Performance Requirements: Do you need top-of-the-line performance or is good performance acceptable?

Scenario-Based Recommendations:

  • Scenario 1: Budget-Conscious, Light Use
    • Recommendation: Samsung Galaxy S21+ 5G. It provides good performance for daily tasks, a lighter form factor, and better audio capabilities. It's a more cost-effective option.
  • Scenario 2: Mobile Gaming & Photography Enthusiast
    • Recommendation: Samsung Galaxy S24 Ultra. Its superior processor, display, and camera system make it the ideal choice for gaming and photography needs.
  • Scenario 3: Professional & Long-Term Use
    • Recommendation: Samsung Galaxy S24 Ultra. The S24 Ultra provides better long-term software support, the fastest processor, and a premium experience overall.
  • Scenario 4: Need lightweight form factor, prefer Audio
    • Recommendation: Samsung Galaxy S21+ 5G. The lighter form factor is comfortable for longer use, with better sound quality.

My Choice

I would choose the Samsung Galaxy S24 Ultra.

Reasoning: While the S21+ 5G offers a lighter design, the S24 Ultra's technological advancements are simply too compelling. The significantly superior processor, camera, display, and battery life offer a better, more versatile user experience that meets my diverse needs. I value the speed and responsiveness of the latest chipset, the versatility and quality of the camera for both photography and videography, and the overall better software support that comes with a newer device. While the price is higher and it is heavier, the S24 Ultra’s improvements across the board make it the more worthwhile long-term investment. It’s a top performer in all key areas.

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.