Kimimaro deals more damage, that's for sure. Plus he's a Sword ninja and can benefit from RoW. Though Hinata basically makes you immune to Standard attacks every 3 or so rounds, plus extra acupuncture and a cheaper mystery.

It's a judgement call - whatever fits your playstyle.

The only problem with both of these guys imo is that even though their defense goes up they have no way to heal up, so I'd recommend bringing a healer. As mentioned above, Kabuto works well with either.