"Stopping power"??? Any pads from any brand will be able to lock up your rear wheel and/or throw you over the front wheel, provided your brakes are adjusted properly. Which means that you will always have all the stopping power you can possibly use (and then some).

Stopping power is never an issue with bicycle brakes. There's no reason to worry about it. Unless, of course, you are talking about some special kind of vehicle, which is, say, unlikely to flip over (e.g. cargo bikes, recumbents etc.)