I was doing the same exact thing my friend. After having to tally the cost for parts:
Ohlins steering damper
Ohlins TTX rear shock
After market exhaust
Rear sets
Levers
The listed above are only the must do's if your going to track for fun.
Literally with the paper work in front of me and the R model sitting on the floor, I turned around and told them change the paper work, I'll take the R.
It's the cheaper way to go, if your going to change the parts listed above.
Plus you get the upgraded engine, the GPS lap timer, carbon everything, and pretty decent Ohlins suspenders for off the assembly line product, an Ohlins SD,and forged rims.
Plus there are good deals for R models out there. I got an R for 28 flat not prep, freight, or any other stuff. I also got an awesome deal on another set of unused forged OEM rims that came off an S model.
Just a thought.
I could just be trying to justify my own insanity...lol.