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Samsung Galaxy S21 Ultra 5G vs Samsung Galaxy Z Flip 8

Compare Samsung Galaxy S21 Ultra 5G vs Samsung Galaxy Z Flip 8 side by side: Exynos 2100 / Snapdragon 888 5G (5 nm) vs Qualcomm Snapdragon 8 Elite Gen 2 for…

Samsung Galaxy S21 Ultra 5G official product image

Samsung

Galaxy S21 Ultra 5G

$1,199

6categories won

Samsung Galaxy Z Flip 8 official product image

Samsung

Galaxy Z Flip 8

$1,099

14categories won

1 categories tied · 21 scored in total · add a third phone

Information Gain

Which one wins?

MxMob Algorithmic Verdict

Samsung Galaxy S21 Ultra 5G takes the overall win

Overall Pick

The Samsung Galaxy S21 Ultra 5G claims the overall win over the Samsung Galaxy Z Flip 8, delivering a stronger technical package across battery endurance and core hardware. For battery longevity and charging speed, the Galaxy S21 Ultra 5G takes the lead, while the Galaxy Z Flip 8 is the clear choice for demanding 3D gaming and heavy multitasking. Choose the Galaxy S21 Ultra 5G if you want the highest performance ceiling, or opt for the Galaxy Z Flip 8 if its lower retail price better fit your budget.

🔋 BatteryGalaxy S21 Ultra 5G

Galaxy S21 Ultra 5G wins on endurance with 5,000 mAh and 25W fast charging.

🎮 GamingGalaxy Z Flip 8

Galaxy Z Flip 8 provides greater sustained gaming output with its Qualcomm Snapdragon 8 Elite Gen 2 for Galaxy and 16GB RAM.

📸 CameraGalaxy S21 Ultra 5G

Galaxy S21 Ultra 5G wins photography with 108MP main imaging and 10x dedicated optical zoom.

🏷️ ValueGalaxy Z Flip 8

Galaxy Z Flip 8 wins on budget and value at $1099 compared to $1199.

Category verdicts are computed algorithmically from verified technical specifications and hardware benchmarks. Rows where neither figure is objectively better — screen size preference, operating system choice, aesthetic build materials — are displayed for direct reference without scoring bias.

Galaxy S21 Ultra 5G vs Galaxy Z Flip 8: specifications compared

Display

Display comparison between the Samsung Galaxy S21 Ultra 5G, Samsung Galaxy Z Flip 8
SpecificationGalaxy S21 Ultra 5GGalaxy Z Flip 8
Screen size
6.8"
6.75"
Resolution
1440 x 3200Winner
1080 x 2640
Pixel density
516 ppiWinner
423 ppi
Refresh rate
120 Hz
120 Hz
Peak brightness
1500 nits
2800 nitsWinner

Performance

Performance comparison between the Samsung Galaxy S21 Ultra 5G, Samsung Galaxy Z Flip 8
SpecificationGalaxy S21 Ultra 5GGalaxy Z Flip 8
Chipset
Exynos 2100 / Snapdragon 888 5G (5 nm)
Qualcomm Snapdragon 8 Elite Gen 2 for Galaxy
Process node
5 nm
2 nmWinner
AnTuTu score
870,000
3,200,000Winner
Geekbench multi
3800
10800Winner
Maximum RAM
12 GB
16 GBWinner
Maximum storage
128GB
512GBWinner

Camera

Camera comparison between the Samsung Galaxy S21 Ultra 5G, Samsung Galaxy Z Flip 8
SpecificationGalaxy S21 Ultra 5GGalaxy Z Flip 8
Main sensor
108 MPWinner
50 MP
Rear cameras
4Winner
2
Optical zoom
10x
—
Ultrawide
12 MP
50 MPWinner
Selfie camera
40 MPWinner
12 MP
Max video
8K at 24fps / 4K at 60fps all cameras
8K at 30fps / 4K at 120fps

Battery and charging

Battery and charging comparison between the Samsung Galaxy S21 Ultra 5G, Samsung Galaxy Z Flip 8
SpecificationGalaxy S21 Ultra 5GGalaxy Z Flip 8
Capacity
5,000 mAhWinner
4,400 mAh
Wired charging
25 W
45 WWinner
Wireless charging
15 W
20 WWinner

Design

Design comparison between the Samsung Galaxy S21 Ultra 5G, Samsung Galaxy Z Flip 8
SpecificationGalaxy S21 Ultra 5GGalaxy Z Flip 8
Weight
227 g
187 gWinner
Thickness
8.9 mm
6.7 mmWinner
Water resistance
IP68
IP68
Build
Aluminum frame, Gorilla Glass Victus front and back
Grade 5 Titanium frame, Ceramic Glass front and back

Software and support

Software and support comparison between the Samsung Galaxy S21 Ultra 5G, Samsung Galaxy Z Flip 8
SpecificationGalaxy S21 Ultra 5GGalaxy Z Flip 8
Operating system
Android 11
Android 17
OS updates
4 years
7 yearsWinner
Security updates
5 years
7 yearsWinner

Connectivity and value

Connectivity and value comparison between the Samsung Galaxy S21 Ultra 5G, Samsung Galaxy Z Flip 8
SpecificationGalaxy S21 Ultra 5GGalaxy Z Flip 8
5G
Yes
Yes
Wi-Fi
Wi-Fi 6E (802.11ax)
Wi-Fi 7 (802.11be, tri-band 2.4/5/6GHz, 320MHz bandwidth)
Storage expansion
None
None
3.5mm jack
No
No
Launch price
$1,199
$1,099Winner

Samsung Galaxy S21 Ultra 5G

The Galaxy S21 Ultra debuted Samsung's seamless Contour-Cut camera housing, simultaneously running 1440p QHD+ resolution alongside a buttery 120Hz refresh rate backed by 12GB to 16GB of RAM.

Display
6.8"
Chipset
Exynos 2100 / Snapdragon 888 5G (5 nm)
Main camera
108MP
Battery
5,000mAh
Full Galaxy S21 Ultra 5G specifications →

Samsung Galaxy Z Flip 8

The Galaxy Z Flip 8 perfects the clamshell form factor with an expansive 4.2-inch outer screen wrapping entirely around the camera bezels, a 4,400 mAh dual battery, and IP48 water/dust resistance.

Display
6.75"
Chipset
Qualcomm Snapdragon 8 Elite Gen 2 for Galaxy
Main camera
50MP
Battery
4,400mAh
Full Galaxy Z Flip 8 specifications →

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