Let's clear thing out:
- Gran Turismo Concept 2001 Tokyo -> NTSC J release
- Gran Turismo Concept 2002 Tokyo -Seoul -> NTSC J release
- Gran Turismo Concept 2002 Tokyo-Geneva -> PAL and NTSC J Release
The differences? 2001 Tokyo has less cars than 2002 Tokyo-Seoul. 2002 Tokyo-Seoul has less cars than 2002 Tokyo-Geneva.