I shoot both a Savage and a Vanguard. The Savage is pre Accustock so I really don't have much of an opinion on the Accustock other than it couldn't hurt.
Both rifles need a stock change in my opinion, unless it's the Sub MOA. If I had a Savage 111 and a Sub MOA setting in front of me I would be torn, it would get down to which one had the longer magazine so I could seat bullets out and which one just fit. I'm a huge Savage fan because I like to tinker but I may just go with the Sub MOA. Hard decision, easy solution, buy both