The TS idea has a lot of merit. As Doc has said the TS frame is lighter than the TM and the geometry is the same. The motors have so much in common and most of the suspension stuff will interchange even if the TS may be a year behind.
The one main problem I do remember with my mates TS125L was that the footpeg brackets bolt on and can sag with a heavy rider or on jumps. I lost count of the number of times I reweled those things. The TM has the brackets welded to the frame and overall it's a stronger setup.