I will attempt to answer my own questions:
- Only difference from SL Black Seven is TT alignment aid. Otherwise same putter and insert, both 365 g heads.
- The original poster (who clearly had many gimmies putting in recent play ) is using the face-balanced version (based on a posted picture). Not that it matters, although I do have a hunch that some of these shapes have a better in-hand balance with some shaft designs than others.