I've been trying to define the somewhat obscure Buell product segments. They may be obvious to you, but I'm not too smart and I'm into S&M (sales and marketing), liking to figure out what engineers are trying to target. This site and a couple of rides have helped a lot.
There are 2 vids on youtube that show the differences between S and Ss as well as can be done without riding them. (As much as any bike out there, I find Buells need to be test ridden.)
S/SX Review -
http://www.youtube.com/watch?v=MILtFY9Zngk&NR=1&feature=fvwp
Jakkel's short Ss Long -
http://www.youtube.com/watch?v=4_lIY5gRl0o
What I get from the XB9SX review (XB12S/SX and XB9SX same chassis) is how compact the S/SX is. They mention how 'toy-like' its size is and the guy looks pretty big on it. It also shows how sensitively the bike handles (e.g. nice scale to the turns and the downshift wag @ 2:39). If you want a "streetbike designed by a racer", this is it. It is more demanding as well as being more rewarding for those that work it. It's pure Erik Buell.
As a counter, member Jakkel cuts up perfect "S" roads with his Ss without effort (followed by a Triumph - which emits awful sounds compared to the Buell!). I found a German interview of Buell claiming that he wanted the Ss to be a bit more 'relaxed', but I doubt an S could lose Jakkel...LeFox?
I don't have Belgium's roads here - they're more open and less intense and I'm not a weekend sport rider. Day-to-day riding needs may explain the Ss's greater popularity in the US.
That said, I'm swinging wildly between S, Ss, or TT. The merits of all are compelling and I'm probably going to grab the first one that swims by of any type.
- Charlie