Well if you put some thought in it, I think they're the same in the medical area, cause we know that kauto healed and kept orochimaru alive for a very long time, after each battle, and after each test they were doing, and then comes tsunade that healed everyone in konoha in the pain invasion arc (yes she used her slugs) but they're part of her medical techniques, but if you remove the slugs then kabuto would win IMO

hope this help. AND I hope I was right about something of what I said xd .