As far as I'm aware the 6G VR-4 was only sold in Japan, the US and Australia. The Australian models were basically the same as the US models apart from being RHD. Only the Japanese models had the Evolution variant.
The JDM models can be broken up into 3 groups:
* Pre-facelift 1987 through to September 1989 models - mechanically these had the 205PS engine with 14B turbo, 450cc injectors, 3-bolt rear end. The RS version had an LSD in the rear and had basic interior with wind up windows (but could have been optioned with electrics if wanted). Looks wise these had the single lamp fog lamps with turn signals in the bumper, colour changing dashboard, the same wheels & spoiler as fitted to the GGSX and the same tail lamps on US '89 models. All models had KM225 gearbox with 3.545 ratios, with some models (most likely RS) having the switchable 2WD/4WD gearbox.
* 'First' facelift October 1989 through to April 1990 - still had the 14B turbo, 450cc injectors and same sized intercooler as above but now had 220PS due to the switch to single board ECU. Updated to headlamps with city lights moved to headlamp cluster, single large bulb corner indicators, same tails as US '91 models, dual lamp fog lamps, deletion of colour changing dashboard, move to 8-spoke alloys and larger bootlid spoiler. Introduction of the 'Super VR-4' which had leather interior and the automatic VR-4 which was detuned to 205hp using TD04 turbo. Non-RS 5spd manual had 3.545 4-bolt rear end while RS had 3.909 4-bolt rear end both with W5M33 gearbox. Autos had 3.307 3-bolt rear end.
* 'Second' facelift June 1990 until the end of production mid-way through 1992 (Evolution spec), only applies to the 5speed manual E38A and E39A models, automatics still same as above - only this model had the big 16G turbo, larger intercooler + piping, 510cc injectors, hood vents, extra bumper vents etc. Introduction of the Monte Carlo VR-4 in both 5spd (Evolution) and automatic (non-Evolution) had black leather interior and colour coded alloy wheels, usually with a sun-roof also. All 5MT Evolution models had 3.909 4-bolt rear, regardless if an RS or not. E39A with 4WS had viscous LSD while E38A RS had plate LSD. Evolution spec had 240hp and 300Nm of torque.
Mine is an Evolution spec but not the RS.