Apparently from Tom's Blog the editing made it look a lot closer than it was. Remember that the producers choose which comments we see good or bad and they say good and bad things about every person's dish. So if they don't show us the good or bad comments for a dish, we are left to believe that one dish was perfect and the other dish sucked. Kevin took round 1, Mike took rounds 2 and 3 (beat Bryan's venison by a hair) and Bryan took round 4.
So Mike wins.
Also in a interview with Tom prior to airing of the show, he quoted Mike as saying that he was a better cook than Bryan, but Bryan was a better chef than him. (ETA: That sounds like a accurate assessment.)