Someone figure out why you don´t can the Pretoria an Semi-slicks on the ClubSport?! 
Strange with the same 19" as the standard GTI.. 
Pretoria alloys were a mk7 / mk7.5 wheel and VW don’t normally carry over wheels from a previous model to the next generation car (An exception was the mk5 GTI Monza alloys which were the wheels fitted to the mk6).
I suppose there’s a chance that VW will introduce additional wheel designs for the mk8 Clubsport as part of a model year update. Alternatively, whatever the 19” option is on the mk8 R could be offered as an option on the Clubsport (the mk7 Clubsport got the optional 19” Prets off the mk7 R). However, if this does happen, IMO it won’t be until after the mk8 R has been officially unveiled.