I've had 2 sets of TDPR 1.2's on my car and they were both great. Also had both R1R's and R888's on too.
The TDPR 1.2's have the motorsport logo on them and the 1.3's don't. They weigh roughly the same size for size too, so it would boil down to design preference.
For track I'd stick with some 8" x 18" alloys at your normal Scirocco offsets. The tyres will be cheaper too - in fact I'm unsure if R888's are available in 19".
As for the tyres, the R888's ultimately have more grip, but the R1R's are quieter on the road and better in the wet. I'd say you get 90+% of the traction of the R888's with the R1R's in the dry and 100% better grip from the R1R's over the R888's when it is very wet. In the damp the R888's are still better than the R1R's.