Oh dear.... you're in for a treat! Go go go and write up a full report for us.
imho... The 250 and a r6 share many handling characteristics, when in doubt, ride it like a 250. Cept be mindful of that throttle hand.
Also, I have ridden my r6 using the same lines and markers as my 250, if you gotz da stones, she will handle it. The only other thing you need to know is, a r6 falls over FAST, a lil countersteer goes a loooooonnnnnggggg way. Take your time getting used to the very twitchy steering but she will be hard to turn while on the throttle. A well set up track bike rides like it's on rails, a well set up r6 is like riding a razor blade.
I wanna see the smile you gotz when you hear and feel 14k in 4th gear, it's where she shines.