I've just test ridden both bikes as a first time off roader..
The CRF is smooth as silk when you open the throttle, a lot more predictable than the CR, especially if like me, you've ridden road bikes for a couple of years. The bike feels slightly heavier than the CR although I doubt that'll matter for a while (until I can jump anyway) and feels slightly more planted than the CR in turns. (Again this could purely be inexperience/lack of speed.)
The CR is somewhat an animal IMO, the throttle is like a 'back wheel spinning 'on/off switch!! (Apparently the back end of the CRF was all over the place too but I guess the slower/deeper sounding noise of the engine convinces your brain you're going slower.) It feels lighter than the CRF and tends to glide over rather than plough through obstacles. I feel that this bike was a lot less forgiving than the CRF, like if you sneeze it might have you off.
Both are awesome bikes but I plumped for the CRF. For me the smoother power gave me heaps more confidence. If anything I went faster on the CRF because the CR made me more scared!! :)
I think if I had had more experience the CR would be the toy to have, lighter, easier to chuck round and *instant* power, the CRF on the other hand seemed slightly more user friendly and much more suited to the novice rider.