H2H: being an undercover agent, I bet Vos must be highly trained even in unarmed combat, since he won’t carry a lightsaber most of the time. So I give it to Vos
Sabers: Vos again considering that he bested Dooku
Force: Revan wins this. Vos dominated Ventress and the sleeper, but Revan is stronger imo
All-out: similarly to Kenobi vs Darth Vader, I see this as extremely close. 50/50, depends a lot in the location. If it’s an open area then Vos should edge it out due his more acrobatic and unorthodox fighting style, however in a more cramped area (see GI vs Kanan first fight) Vos would be more limited and Devan could abuse his force power edge even more