I think it basically comes down to the fact that the R33 had a big options list when they were new - thats why you see skylines fitted with all sorts of options
For instance mine is almost identical to the "Type M" shown on the Skylines downunder link with side skirts, front bar, and red S badge, and an extra rear spoiler lip underneath the normal series 1 spoiler.
I seriously doubt that there is an upper specced R33 Type M like the R32 apart from the normal turbo model