Miele - Complete C3 Cat & Dog vs Shark - Detect Pro Cordless IW1511

The Complete C3 Cat & Dog is the clear pick on raw spec strength, leading by 16.5 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 Complete C3 Cat & Dog if you care most about dustbin and suction (aw). The biggest gaps in its favor are dustbin, suction (aw).

Pick the Detect Pro Cordless IW1511 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: the Complete C3 Cat & Dog is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.