I have the R33 Series II factory broacher and price list and the model names are not as simple at they appear.
The turbo coupe versions are:
GTS 25 T Type M (This is the one with the V-Spec active diff and cost 3,567,000 yen)
GTS 25 T Type M Spec II
GTS 25 T Type M Spec I
As I cannot read Japanese I do not understand what the difference is between the Spec II and Spec I models – they even cost the same 3,007,000 yen.