I did a really quick a dirty edit to see how that'd look.
Definitely like it mirrored better.
I tried rotating it to more clearly resemble an S, but I think it detracts from it, since then it just becomes a letter, instead of a slightly more abstract (and IMO memorable) logo.
I personally prefer the S, but all of these are great really. Considering it's so close to being an S I feel like a lot of people are going to notice that too, but I might be wrong. It was also discussed a little previously: https://slrpnk.net/post/9709041