actually, the SW feels slightly higher on the non-S despite what the TW specs say but not much in it and that could be QC. I think someone else noticed that too. I will report back after my match which starts in an hour. 16x18 is still pretty open of course.
one thing I do know is the 99S felt great in the hand to me and it was because of that I wanted to try the 99. will update in 3-4 hours or so.