In general as stated a Motocrosser will have more “explosive” response everywhere, as well as more overrev, this is becauseyou need to have instant aceleration to clear the triples with only 7 metre runup etc, the price as Moto stated is reliability and maintenance schedules. I don’t worry about peak HP, I owned a fairly modified GSXR1100 that won several of the old regional AMCN horsepower shootouts through the 90’s, and was sub 10s across the quarter yet up to 200 klicks a well tuned exup 1000 used to nail me.
response is the krey for me, I have sacrificed my overrev on the Yz for an explosive bottom and lower mid-range for clearing logs, gullies, ruts and to assist in knarly hillclimbs. As a mate who owns a TM300 said, comes off the bottom into the pipe all woohoo, then nothing. Not perfect but better than all top end
BTW the 250 smokers are rated at over 40-45 hp as well, with less revs on board.
Having said all this there is only 2 x 450s that tempt me, and the kermit coloured one is one of them
Mr Blue