Shark - Stratos Upright vs Tineco - Pure One S15 Pro Extreme

These two are nearly even on the Mars Score (76.7 vs 74.4). The decision isn't about overall quality — both clear the bar — it's about which specific trade-offs fit your use.

Pick the Stratos Upright if you care most about dustbin and suction (aw). The biggest gaps in its favor are dustbin, suction (aw).

Pick the Pure One S15 Pro Extreme if you carry the device everywhere and weight or thickness has been the deciding factor before. Its strongest claims are weight, cordless, battery.

There are no meaningful ties on the headline specs — every popular-comparison metric has a winner.

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