At 140 Khan wins one sided UD or TKO. At 147 it's a competitive fight, with Khan having an edge. If Devon can make Khan respect his power and land shots he can have enough time to think and box well enough to win. Otherwise Khan smothers him and Alexander wouldn't be able to react.
Peterson also beats Alexanders ass. But lets start overrating him again based on a win over a bloated, over the hill Maidana... that is until he quits or gets beat up by Berto, Brook or Ortiz, lol
What edge does Khan have? Alexander has more power, is just as fast, is equally skilled, is better on the inside, is a Southpaw, has more experience against better fighters, is a better counter puncher and is better defensively...I'm not following what attributes that you feel give Khan an edge?
If Alexander couldn't beat Kotelnik, he isn't beating Khan. LOL. Styles make fights. Heard of this before?
Matthysse said Judah is MUCH better than Alexander. What does that mean? Nothing. Again, styles make fights. I'll say one thing though. Any fighter that has basic counter punching skills, can beat Alexander, just like the 'slow, no power Kotelnik' did (till he got robbed, of course).
Alexander and Peterson have the same style for the most part, it is just that Alexander has the better technique, more power, and faster hands. So the same style that caused Khan problems with Alexander, he would have to deal with again from Devon, so tell me, how does Khan beat him?