It's only fair if we're doing prime for both. I would 100% back prime Makhmudov to KO prime Price. and think there's a very strong possibility that Makhmudov today would beat the undefeated Price who demolished the British domestic scene. Price simply couldn't take a punch and if he tasted any heavy leather he would almost certainly mentally check out.
Absolute shootout, but got to go for the main man Pricey and his massive suit. Whoever lands first, really, but I'd be backing Big Suit.