I always thought viCe was just for like, immoral habit/addictions versus viSe for clamping devices, but I've become comfortable using viCe for both.
Anyway I looked into it, viCe is a clamping device in BRITISH English, but just as "colour" wouldn't traditionally fly in the US, a clamp should be a viSe to those of us stateside. Though this seems like a pretty useless thing to fuss over and I doubt anyone would bother caring.