I think you are getting it. The CS sounds better and (to many) looks better/more sensual.
The scud kicks the CS's ass in performance. Period.
But then, how many really drive at 7/10th ever, let alone 8, 9 or 10/10ths?
I have had my CS for a year, and am growing more fond of it every day. I recently went all the way to the alter to marry a Scud and ditch the CS...but couldn't do it! That said, I think your realization that you can always get a CS now and then change to a Scud in the future is exactly the thought that won the day with me last year when I was deciding on the CS vs. Scud the first time.
Finally, I read that you were looking at an 800km CS. I have to say you should think very carefully about that. For two reasons. First, as you will read on the internet from far more experienced folks than me, essentially not being used for 8 years is a very, very (very!) bad thing! Second, it will be the "garage art" CS. By that I mean, the CS is a marginal (as in maybe someday) collectable (time will tell). And, when you own one, many folks fall prey to the trap of "not wanting to use it as it was intended" because they don't want a rock chip or a sand blemish on the windscreen or whatever. I am glad I got a 13k mile example and I drive it like it was intended as often as possible. Be careful, if you get a low mileage "collector" CS you may not want to enjoy it. If, OTOH, you are looking for a peice of garage art, then by all means there you go...