These are probably my two favorite series of cards, besides maybe the Wynn or Artifice series. I've actually never handled any of the decks up there, though I absolutely love the handling on S&M v4-v6 and the SS Lions and I can only assume that the older versions handle even better based on what I've heard. It's unfortunate that these versions are so expensive, so I probably won't get the opportunity to use them for quite some time, but who knows.
Anyway, I can't comment on the handling at all, and I'm assuming they're both top quality for handling. The v7s kind of left a bad taste in my mouth, but I don't think it detracted from my opinion of the earlier decks in the series. I pretty much voted on design, and I have to say that I like the S&M designs better, especially the court cards. The back designs are both awesome, but I'd have to give the edge to S&M on that as well. Overall, the two series are really, really close for me, but S&M gets the edge.