Amazon - Kindle Oasis (3rd gen) vs Kobo - Sage

These two are nearly even on the Mars Score (71.9 vs 73.1). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.

Pick the Kindle Oasis (3rd gen) if you carry the device everywhere and weight or thickness has been the deciding factor before. The biggest gaps in its favor are weight. The single most decisive one: Weight — 52.00 g less. 188 vs 240.

Pick the Sage if the display is what you stare at all day — refresh rate, brightness, or sharpness is where the difference will be most visible. Its strongest claims are screen size. The single most decisive one: Screen size — 14.29% more. 8 " vs 7 ".

Both ship with comparable resolution, storage, waterproof, so those specs do not separate the two — focus on the differences below.

Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity says both are well-rounded; the differences are about trade-offs, not quality.