Sorry I can't help except to say I'm positive there are some differences in the final drives when comparing V7s, V7850s, V9s, and V85s.
I just know that at some points we were told they were strengthened for additional power etc
Could be internal or something that doesn't effect wheel compatibility, but they aren't identical so we probably can't assume compatibility without checking some dimensions or comparing say the part numbers of the coupler that matters with the wheel. I'd also want to know if the axle was the same OD but I suspect it is.