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Head-to-head

Boox - Tab Ultra C Pro vs Kobo - Sage

Last updated · How Mars Score works
Tab Ultra C ProBOOXRENDER
Probe A
Boox
Tab Ultra C Pro
95.0/ 100S
Display95· 45%
Storage & Battery95· 30%
Design—· 25%
SageKOBORENDER
Probe B
Kobo
Sage
69.6/ 100B
Display81· 45%
Storage & Battery50· 30%
Design—· 25%
Quick verdict

Between the Tab Ultra C Pro and Sage, the Tab Ultra C Pro comes out ahead in storage and screen size, while the Sage wins on weight and waterproof. Overall, the Tab Ultra C Pro scores 95 and the Sage scores 69.6 on our Mars Score.

Buying advice

Which should you buy?

The Tab Ultra C Pro is the clear pick on raw spec strength, leading by 25.4 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.

Pick the Tab Ultra C Pro if the display is what you stare at all day — refresh rate, brightness, or sharpness is where the difference will be most visible. The biggest gaps in its favor are storage, screen size, color screen.

Pick the Sage if you carry the device everywhere and weight or thickness has been the deciding factor before. Its strongest claims are weight, waterproof.

Both ship with comparable resolution, so those specs don't separate the two — focus on the differences below.

Bottom line: the Tab Ultra C Pro is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.

Why Boox - Tab Ultra C Pro wins

  • ▲Storage — 300.00% more. 128 GB vs 32 GB.
  • ▲Screen size — 28.75% more. 10.3 " vs 8 ".
  • ▲Has Color screen.

Why Kobo - Sage wins

  • ▲Weight — 240.00 g less. 240 vs 480.
  • ▲Has Waterproof.
Full readout

Spec comparison

Display

SpecBoox - Tab Ultra C ProKobo - Sage
Screen sizeⓘ10.3 "lead8 "
Resolution300 ppi300 ppi
Color screentrueleadfalse
Warm lighttruetrue

Design

SpecBoox - Tab Ultra C ProKobo - Sage
Weight480 g240 glead
Waterprooffalsetruelead
Page-turn buttonsfalsetruelead

Storage & Battery

SpecBoox - Tab Ultra C ProKobo - Sage
Storageⓘ128 GBlead32 GB
Battery life2 weeks8 weekslead
Reader questions

Frequently asked

Drill down

Spec-level deep dives

Screen size→Resolution→Color screen→Warm light→Weight→Waterproof→Page-turn buttons→Storage→Battery life→
By manufacturer

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