I'll have to cast my vote in favor of the landslide victory of kool stop salmon, I had a pair on my daily commuter back home and they stopped on a dime.
The first thing you do when you buy a tektro caliper is to remove and toss the inserts and replace them with koolstop salmons.
The only upstaging to kool stop salmons, I have be honest, are the swisstop yellows that came stock with my sram red brakeset on my roadie. They are so grippy on the brake surface of my s80's that I have the feeling that if I were to just crush the brifter in during a full sprint I would instantly go over the bars. But considering the price of them is nearly 5 to 1 the price of kool stop salmon inserts I'll have give the blue ribbon to the salmon pads.