Now that I am looking at the specs closely, the pedals on the SL are MKS removable pedals ... not folding pedals.

The front hubs are different. The rims are different.

The SL comes with a Sugino crank.

Hmmmm, looks like a bunch of small differences. I don't really know whether it is worth the long wait unless you have weirdo knees like me. Also note, that I am not desperate for the bike either. That is, such a bike will make my life a little easier; but I have alternatives.

-G