Seems we're heading a bit off topic here- talking of YZ250F frame paint and even a bit of XR650R vs XR600R.
I'm a multi-time XR600 owner and at one stage I tried an XR650R. My thoughts at the time when I rode it in tight/slippery/knarly conditions were that it was very stable at speed, was very very fast (which is great in open going!) but ate the juice had too much power and wheelspin for where I ride (which actually works against the bike), boiled in the tight going, had less ground clearance, didnt turn as quickly as the 600 and felt more top-heavy.
This is not to brand the XR650R as a dud, I just feel that it has its place and thats in the desert where you can use a 160km/h plus top speed, the rigid frame and sliffer suspension.
While the XR6 was a bike that worked with you, not against you no matter what you did with it. I think the word is VERSATILITY.