I found a post about the differences between TFSI and TSI in the golf GTI's and it says all cat backs fit across from TFSI to TSI. Its the same engine as the Leon so I guess it does on the Leon also.
I read somewhere (Probably on this forum) that MK5 GTI Milltek exhaust will fit on a Leon as well.
The R32 may fit, is the gap between the central exhausts the same as the
Cupra R valance gaps though?