Yeah, it is kind of surprising (though i know nothing about either camera) the number of times i have read a similar statement.Several years ago I had a chance to buy an SP and thought I would love it (especially the clever viewfinder frames). However, it just didn't appeal to me when I actually handled it - I don't know why.
The S2 is totally cool.
I guess it because i read that the SP is the "pro" model, and that stuck in my head.
I suppose i should know better...look at the cost of an F4 or F2 Vs. some of the FM series of camera.....

Not saying that is an exact analogy...but a similar 'phenomenon'.