Samsung Galaxy A42 5G vs OnePlus 9 - Detailed Phone Comparison

Detailed Comparison

Specification
OnePlus 9
OnePlus 9
Oneplus

General

Launch Date November 11, 2020 March 26, 2021
Release Year 2020 2021

Physical

Volume 107.31 cm³ 103.29 cm³
Screen Size to Weight Ratio 3.42 "/g 3.41 "/g
Weight 193 g 192 g
Height 164.4 mm 160 mm
Width 75.9 mm 74.2 mm
Thickness 8.6 mm 8.7 mm
Foldable Design No No
Available Colors
  • Prism Dot Black
  • Prism Dot White
  • Prism Dot Gray
  • Winter Mist
  • Arctic Sky
  • Astral Black

Display

Screen Size 6.6 " 6.55 "
Resolution 720 x 1600 1080 x 2400
Aspect Ratio 20:9 20:9
Screen-to-Body Ratio 84.3 % 87.2 %
Pixel Density 266 PPI 402 PPI
Refresh Rate N/A 120 Hz
Typical Brightness N/A N/A
HBM Brightness N/A N/A
Peak Brightness N/A 1100 nits

Hardware

Battery Capacity per Screen Area 114.78 mAh/in² 104.89 mAh/in²
Battery Density 46.59 mAh/cm³ 43.57 mAh/cm³
Battery Capacity 5000 mAh 4500 mAh
NFC Support Yes Yes
Chipset Qualcomm SM7225 Snapdragon 750 5G (8 nm) Qualcomm SM8350 Snapdragon 888 5G (5 nm)
CPU Octa-core (2x2.2 GHz Kryo 570 & 6x1.8 GHz Kryo 570) Octa-core (1x2.84 GHz Cortex-X1 & 3x2.42 GHz Cortex-A78 & 4x1.80 GHz Cortex-A55)
GPU Adreno 619 Adreno 660

Connectivity

USB Version 2.0 3.1
OTG Support 1
DisplayPort
DisplayPort Version N/A N/A
USB Features USB Type-C 2.0 USB Type-C 3.1, OTG

Software

Operating System Android Android
Initial OS Version 10 11
Maximum OS Version 13 13

Comparison Summary

Smartphone Comparison: Samsung Galaxy A42 5G vs. OnePlus 9

1. Specifications Comparison

FeatureSamsung Galaxy A42 5GOnePlus 9Practical Impact
Design
Dimensions164.4 × 75.9 × 8.6 mm160 × 74.2 × 8.7 mmA42 5G is slightly larger but both are similar in thickness, OnePlus is more compact which may be easier to handle for some users.
Weight193g192gVirtually identical weight; neither will feel significantly heavier than the other.
Display
Size6.6"6.55"Negligible difference in size; both offer a large viewing area, very similar user experience
Resolution720x16001080x2400OnePlus 9's higher resolution results in significantly sharper text, images, and video, more detailed experience.
PPI266402OnePlus 9 display appears much clearer and sharper due to higher pixel density, less pixelation in images and text.
TechnologyAMOLEDAMOLEDBoth use AMOLED; expect vibrant colors, deep blacks, and good contrast from both.
Refresh Rate60Hz120HzOnePlus 9 provides significantly smoother scrolling and animations, especially noticeable during gaming and fast-paced content.
Brightness0 nits1100 nitsOnePlus 9 has drastically better screen visibility in bright, outdoor conditions and direct sunlight.
Performance
ChipsetSnapdragon 750 5G (8 nm)Snapdragon 888 5G (5 nm)OnePlus 9 offers substantially faster performance, better for gaming, video editing, and demanding applications.
AnTuTu Score392,400880,900OnePlus 9 is significantly faster in benchmarks and real-world usage, expect much quicker load times and better multitasking performance.
GPUAdreno 619Adreno 660OnePlus 9 provides better graphical performance, especially beneficial for gaming and graphically intensive applications.
Camera
Standard Camera48MP, f/1.8, 1/2"48MP, f/1.79, 1/1.4"OnePlus 9's larger sensor captures more light, resulting in better image quality, particularly in low-light.
Selfie Camera20MP, f/2.216MP, f/2.4A42 5G may have better selfie quality due to higher MP, while OnePlus may have better light gathering due to better sensor
Wide Angle Lens5MP, f/2.250MP, f/2.2, 1/1.56"OnePlus 9 captures much more detailed wide-angle shots with a much higher resolution sensor.
Portrait (Depth)5MP, f/2.4NoneA42 5G has a dedicated depth sensor for portrait shots, while the OnePlus 9 relies on computational depth.
Macro Lens5MP, f/2.4NoneA42 5G has dedicated Macro lens for close-up shots, while OnePlus 9 does not provide this functionality
Black & WhiteNone2MP, f/2.4OnePlus 9 has dedicated Black & White sensor which may enhance monochrome shots, while the A42 5G doesn't.
Video4K@30fps8K@30fps, 4K@60fpsOnePlus 9 offers significantly higher video resolution and frame rate options for professional quality videos.
Battery
Capacity5000mAh4500mAhA42 5G's larger battery should provide longer battery life under typical usage, can extend usage between charges.
Charging15W Fast Charging65W Fast Charging, 15W WirelessOnePlus 9 charges much faster, reducing charging time and getting you back to using your phone more quickly.

2. Key Differences Analysis

Samsung Galaxy A42 5G Advantages:

  • Larger Battery: The 5000mAh battery offers potentially longer battery life, crucial for users who prioritize endurance over performance.
  • Dedicated Macro and Portrait lens: A42 5G has dedicated macro and portrait lens allowing for more creative and specific photography.

OnePlus 9 Advantages:

  • Significantly Faster Performance: The Snapdragon 888 chipset provides superior processing power, resulting in faster app loading, smoother multitasking, and better gaming.
  • Superior Display: The higher resolution, pixel density, brightness, and 120Hz refresh rate results in a much sharper, more vibrant, and fluid user experience.
  • Faster Charging: 65W fast charging and 15W wireless charging significantly reduce the time spent tethered to a charger.
  • Superior Camera System: Larger sensor and better video capabilities, will result in higher quality videos and photos
  • More Features: Improved audio, wifi, and bluetooth.

Trade-offs:

  • The Samsung A42 5G trades performance and display quality for a larger battery and lower cost.
  • OnePlus 9 trades battery size for significantly better performance, display, and camera quality.

3. User Profiles & Recommendations

Samsung Galaxy A42 5G:

  • Ideal User: Budget-conscious users who prioritize battery life and affordability over top-tier performance, photo enthusiasts wanting a dedicated depth and macro lens
  • Use Cases:
    • Everyday browsing, social media, and media consumption
    • Users who need long-lasting battery life during travel or work
    • Users who value budget-friendly phones and don't mind a lower resolution screen

OnePlus 9:

  • Ideal User: Users who prioritize performance, display quality, and fast charging, users who need good low light camera performance and superior video quality
  • Use Cases:
    • Mobile gamers looking for smooth gameplay and fast loading times
    • Users who frequently use demanding applications and need good multitasking
    • Multimedia creators who want the best video quality
    • Users who value fast charging and don't mind slightly lower battery life for better performance

Price-to-Value Ratio:

  • The Samsung Galaxy A42 5G is a great budget choice for users who value battery life above all else.
  • The OnePlus 9 offers a very high performance, display and camera for its price, representing great value for users seeking premium features without the flagship price.

4. Decision Framework

Key Questions to Consider:

  1. What is your budget? If you're on a tight budget, the Samsung Galaxy A42 5G may be more appealing.
  2. How important is battery life to you? The A42 5G offers a larger battery, which means longer life between charges.
  3. How important is performance and display quality to you? If you are a power user, the OnePlus 9 offers significant improvements in these areas.

Scenario-Based Recommendations:

  • Scenario 1: Budget User, Battery Priority: If you need a phone primarily for social media and media, and you value battery life above all else, the Samsung Galaxy A42 5G is a good fit.
  • Scenario 2: Performance and Display Enthusiast: If you play mobile games, watch high-resolution videos, or need fast, responsive performance, and value camera quality, the OnePlus 9 is the superior option.
  • Scenario 3: Photography Enthusiast: If you like taking unique photographs and enjoy the freedom of a macro and depth lens, the A42 5G is a good pick, though video quality will suffer compared to the OnePlus 9.

My Choice

If I had to choose, I would choose the OnePlus 9. While the Samsung A42 5G has better battery life, the overall experience of the OnePlus 9 is significantly better. The performance gains, along with the superior display, faster charging, and better camera system make it a clear winner for me. While the A42 5G has a better budget price, the overall experience of the OnePlus 9 justifies the extra cost. As a power user, I'd appreciate the fluid experience, and higher quality photo and video capture, I would prefer faster charging capabilities and would happily sacrifice a small amount of battery life for this trade-off.

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