I'm going with Max Mercury.He seems to be way faster than Quicksilver and neither is a really good fighter so in that department..I don't know what to make of it.Quicksilver seems to be the better decision maker in combat but if he can't keep up with Max..he's going to have to think faster.
Max isn't just fast. He's quick. Remember when Silver Age Zoom was running rampant thinking he was Barry? Max was doing acrobatics across an unfinished building at superspeed. He's a teacher of speedster, so he knows how to take them down. Also, wasn't he the one that taught Wally how to steal speed from things? Can't he just do that to Quicksilver?