Hi,
It's basically a mk1 with a mk2 front shock tower.
To understand the differences between the mk1 and mk2 your best course of action would be study pages 27 to 30 of the Lazer ZX-R manual on Retromodelisme as these pages are the supplement to convert the mk1 to a mk2.
http://www.retromodelisme.com/manuel...-r-kyosho.html