Vince was better while Ray had the better career, though honestly looking at their careers they were pretty similar
Their skillsets are comparable, I mean Vince was better at playing above the rim but Ray on the Bucks/Sonics could yam on nikkas too, and while Ray was a better 3 point shooter it's not like Vince wasn't well above average in that department either.
Both good free throw shooters, could slash to the rim or be a catch and shoot guy, etc. I guess the major differences were that Vince had a post game unlike Ray, whereas you'd never see Vince run around screens like Ray and to a lesser extent Rip Hamiton used to do
Even when they got older and were relagated to second options and then bench players both were effective well into their late 30's (with Vince still going strong at 40).
Honestly the only thing separating them is the fact that Ray managed to get a few rings in a supporting cast role, cause other than that their careers panned out almost the same.