Galaxy S20 Ultra vs OnePlus 8 Pro
Shop Samsung Galaxy
Galaxy S20 Ultra
Starting at
£269.45£1,199.99 new
OnePlus 8 Pro
Starting at
£177.00What's the difference between the Galaxy S20 Ultra and OnePlus 8 Pro?
Galaxy S20 Ultra vs OnePlus 8 Pro comes down to the battery, screen size and screen type. Refurbished, the OnePlus 8 Pro starts at £177, £92.45 less than the Galaxy S20 Ultra.
Refurbished from
Battery
Screen size
Screen type
Main camera
Front camera
- The Galaxy S20 Ultra has a bigger battery: 5000 mAh vs 4510 mAh.
- Screen size: 6.9 inch on the Galaxy S20 Ultra, 6.78 inch on the OnePlus 8 Pro.
- Screen type: Dynamic AMOLED 2X on the Galaxy S20 Ultra, Fluid AMOLED on the OnePlus 8 Pro.
Galaxy S20 Ultra vs OnePlus 8 Pro specs
The Galaxy S20 Ultra and OnePlus 8 Pro are both 2020 Android phones with high-end features that suit different needs. The Galaxy S20 Ultra offers a larger screen and higher resolution, a bigger battery, and more detailed cameras including a 108MP main camera and a 40MP front camera. The OnePlus 8 Pro has a slightly smaller but still spacious screen and supports 5G networks which may appeal if you want faster mobile data. It also offers more storage options and is lighter and narrower, making it easier to carry. Choose the Galaxy S20 Ultra if you prioritise screen size, battery life, and camera detail. The OnePlus 8 Pro suits those who want 5G, more storage flexibility, and a lighter design.
Galaxy S20 Ultra vs OnePlus 8 Pro price
Colour
- GreenSold out
- BlackSold out
Storage
- 128GBSold out
- 256GBSold out
Galaxy S20 Ultra vs OnePlus 8 Pro battery life and software updates
Durability covers battery capacity, software updates, and build features that affect everyday use and longevity. The Galaxy S20 Ultra and OnePlus 8 Pro share the same Android OS and release year but differ in battery capacity.
Battery Capacity
The Galaxy S20 Ultra has a 5000 mAh battery which provides more capacity for longer use between charges. The OnePlus 8 Pro has a 4510 mAh battery, which is smaller but still substantial for daily tasks. If you regularly need extended battery life without charging, the Galaxy S20 Ultra fits better.
Battery
Foldable
Software updates
Year of release
Galaxy S20 Ultra vs OnePlus 8 Pro performance
Chipset
RAM
Galaxy S20 Ultra vs OnePlus 8 Pro screen
Screen quality influences how you experience content, with differences in size, resolution, and display technology between the two devices.
Screen Size and Resolution
The Galaxy S20 Ultra has a larger 6.9 inch screen with a resolution of 1440 x 3200, offering slightly more display area and vertical pixels. The OnePlus 8 Pro's screen is 6.78 inches with a 1440 x 3168 resolution. The Galaxy's larger screen suits those who want more room for video or multitasking.
Screen Type
The Galaxy S20 Ultra uses Dynamic AMOLED 2X, while the OnePlus 8 Pro has Fluid AMOLED. Both provide vivid colours and deep blacks, but the Galaxy's Dynamic AMOLED 2X may offer a smoother experience for fast motion or gaming.
Refresh rate
Resolution
Screen size
Screen type
Galaxy S20 Ultra vs OnePlus 8 Pro camera
Camera specifications are a key consideration for many buyers, especially the megapixel count on front and main cameras, which affects photo detail.
Main Camera Detail
The Galaxy S20 Ultra features a 108 megapixel main camera, capturing higher detail in photos compared to the OnePlus 8 Pro's 48 megapixel main camera. This suits users who prioritise photography with more resolution.
Front Camera Quality
The Galaxy S20 Ultra offers a 40 megapixel front camera, which is notably higher resolution than the OnePlus 8 Pro's 16 megapixel front camera. This is important for selfies and video calls where detail matters.
Camera Type
Both phones have quadruple (4x) camera setups, providing multiple lenses and features for versatile photography.
Camera type
Front camera
Main camera
Galaxy S20 Ultra vs OnePlus 8 Pro size and design
Other differences cover network support, size, weight, storage options, and expandability, all of which affect how the phone fits your lifestyle.
Mobile Network Support
The OnePlus 8 Pro supports 5G networks, offering faster mobile data where available. The Galaxy S20 Ultra supports 4G, suitable for everyday use but without the higher speeds of 5G.
Storage Options
The OnePlus 8 Pro is stocked with both 128GB and 256GB storage variants, giving more choice for users who need extra space. The Galaxy S20 Ultra is available with 128GB.
Expandable Storage
The Galaxy S20 Ultra includes a microSDXC card slot, allowing you to add extra storage easily. The OnePlus 8 Pro does not have this option, so you rely on built-in storage.
Size and Weight
The OnePlus 8 Pro is lighter at 199 g and slimmer with a depth of 8.5 mm and width of 74.4 mm. The Galaxy S20 Ultra is heavier at 222 g, and measures 8.8 mm deep and 76 mm wide. The OnePlus 8 Pro may feel easier to handle and carry.
SIM and Connector
Both phones offer dual physical SIM slots and use USB-C connectors, ensuring flexibility with carriers and modern charging and data cables.
Carrier compatibility
Connector
Depth
Height
Mobile network
SD card slot
SIM card
Weight
Width
Galaxy S20 Ultra or OnePlus 8 Pro: which should you buy?
Buy the Galaxy S20 Ultra if
- you want a bigger battery (5000 mAh vs 4510 mAh)
- you want a higher-resolution main camera (108 megapixels vs 48 megapixels)
- you want a higher-resolution front camera (40 megapixels vs 16 megapixels)
Buy the OnePlus 8 Pro if
- you want to spend less: it starts at £177, £92.45 less than the Galaxy S20 Ultra
- you want 5G
- you want a lighter build (199 g vs 222 g)
What our customers say
Customers who have chosen the Galaxy S20 Ultra often praise its condition, with many saying it looks like new or better than described. Users highlight the phone's battery life and camera quality, particularly appreciating the detailed camera and reliable performance during daily use. Some mention it loads apps quickly and remains a satisfying device after extended ownership. A few note minor issues related to previous user data but overall express strong satisfaction with the device's build and features.
Reviews for the OnePlus 8 Pro describe it as a high-spec phone in good to excellent condition. Customers appreciate its smooth operation and ease of setup, even for less tech-savvy users. Battery life is mentioned as variable, with some experiencing quicker drain or heat, while others find it reliable. The phone's storage options and 5G support appeal to many, and several users say it looks almost mint or better than expected. The OnePlus 8 Pro suits those who want a good balance of features and modern network capability.
Both devices are well received by their users. The Galaxy S20 Ultra suits those who value a larger screen and camera detail, while the OnePlus 8 Pro appeals to buyers looking for 5G support and a lighter handset. Both offer unlocked dual SIM flexibility, making them practical choices for various needs.
Galaxy S20 Ultra vs OnePlus 8 Pro FAQs
Galaxy S20 Ultra vs OnePlus 8 Pro comes down to the battery, screen size and screen type. The Galaxy S20 Ultra has a bigger battery: 5000 mAh vs 4510 mAh. Screen size: 6.9 inch on the Galaxy S20 Ultra, 6.78 inch on the OnePlus 8 Pro.
The OnePlus 8 Pro is cheaper refurbished, from £177 compared with £269.45 for the Galaxy S20 Ultra.
The Galaxy S20 Ultra has a bigger battery: 5000 mAh vs 4510 mAh.
The Galaxy S20 Ultra has a higher-resolution main camera: 108 megapixels vs 48 megapixels.
Updates for the Galaxy S20 Ultra ended in Mar 2025. We don't have published update dates for the OnePlus 8 Pro.
Refurbished, the Galaxy S20 Ultra comes in 128GB, and the OnePlus 8 Pro in 128GB and 256GB.
