I would not wear snuff with those colors.
My standard lined shell LHS are EE width since my instep can't handle the strap in my normal E width. The BB and unlined snuff are E width, though, and in my TTS size, so they are a half size longer than I take in the standard lined Van (also Barrie), but I have no problem with heel slippage. When I was at Alden DC buying the snuff LHS, I took along my BB unlined for size and comparison and, they were identical. Joe said that the BB unlined are on the Copely last but used to be on the Van last (I realize there is a lot of disagreement on this point, though). But the unlined snuff LHS are supposedly on the Van last, so, whatever. One interesting observation I have had is that if you turn the shoes over and compare them visually, the lined LHS of the same size as the unlined, whether BB shell or snuff suede, the waist of the shoe under the arch and the heel as well are both noticeably narrower in the unlined shoes. I don't know if this is because the lasts are different or because the unlined shoes are just lighter overall and don't require as full a base.