Grade them 1 2 n 3... Khan 23 wins 17 KO's, 1 loss 70.83 KO ratio Bradley 26 wins 11 KO's 0 losses. 40.74 KO ratio Devon Alexander 21 wins 13 KO's 0 losses 61.9% KO ratio. on paper it looks clear, however the level of opposition has bearing on this KO ratio a fighter has. If a fighter fights tomato cans most of their career then they can appear to have a bigger punch than someone that steps up to a higher level of opposition earlier in their career. Anyway discuss..
Khan dosen't sit down on his punches completly. He still has some AM tendencies and he is young. Im sure his power will improve.
1 Alexander 2 Khan 3 Bradley Alexander's KO of never-been-stopped-and-rarely-hurt Urango is the shining example here.