Car choice is very subjective. I personally found the 997 GT3 RS (v.1) to be notchy and quite easy to miss-shift at 9/10ths driving. Despite this, it IS more rewarding than the CSL, as when you get everything right, the sense of achievement makes you bond more with the car.
However, I have only ever driven one on track (but I didn't want to hand it back to my mate afterwards), so not sure how they are at more normal speeds.
What I'm trying to say is that you need to get yourself behind the wheel and see if it is for you, especially as you're saying that you already have a preference for the CSL's SMG.
As an aside, white ones are fastest
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Mike R
Sarcasm is just a free service I provide.
Nordschleife, there's only two barriers to worry about - the ones on the left and the ones on the right
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CSL number 044