how much both bikes?

Purpose? Racing or orchard trail used?
Sometimes its the rider aint the bike. The bike aint nothing if the rider cant control it. And the answer to that is obviously the European KTM450 =)

U got it so right!!!!!!

if i were you i'll think of bike maintainance. mostly like that the 250f engine gonna wear off way earlier than the 450f which most unlikely that you would be able to full pin the throttle on the corners and out of it. Unless you're as fast as those in the Malaysian motorcross Scene.