The Hasagawa XJS is a nice kit, but the underside really lacks detail. It has a moulded in gearbox and the suspension is simplified. Having said that, it does make a nice model - just maybe not as nice as those Fujimi EM kits.
Agreed - the Fujimi Enthusiast models have the best detail I've ever seen. Even after 20 odd years I dont think anything rivels them for detail, however I do think some of Tamiya's latest stuff is coming very close (Enzo, Mclaren SLC, Ferrari 360).