He won 4 rounds, Logan only won 2.
He got 172 points, Logan got 171.
Everyone thought Logan would win because he had better physique, but the truth is, in boxing, muscle mass just tires you out. Logan started great, landed some good punches in the first two rounds, completely blanked out later and KSI took it from there. He came in with a more lean and smarter approach.
It was only a tie because KSI hit once after the bell and had a bunch of points docked off. If he didn’t do that, KSI would have won by a landslide.