I've been riding a 2002 CR250, I'm considering also getting a 2003 CRF450. For those that have ridden both the CR and CRF, is the CRF power gain real big? Does it launch that much harder out of turns like some claim? I also have a CR500 and a guy told me he felt his piped CRF450 almost equals the CR500 - I HAVE A REAL HARD TIME BELIEVING THAT???