Well, let's see...
In 93 they offered three models:
R1- Less bling but a little more 'go' oriented. Two oil coolers, factory front strut bar, bigger front air-dam, cloth seats, stiffer shocks, 'Z' rated tires and came with a rear spoiler. No cruise, no CD (only AM/FM cassette), no fog- lights, no rear wiper, sun roof not available.
TOURING - as the name implies: leather seats, only one oil cooler (driver's side), small front air-dam, but came standard with options like BOSE AM/FM CD with the snake-like tubes in the rear luggage area, Fog lights, cruise control and rear wiper. There were a few other available options, like a sun roof and an automatic transmission (eek2) . And it had slightly softer shock rates.
BASE: As the name implies, it came with just standard features. Also had cloth seats of a "hound's tooth" type pattern.
Regardless of the 'model' and year (93-95), all came with the same sequential twin-turbo 13b REW making the same HP and torque.
I'm not all that familiar with the other year's options, but IIRC, the 93 'R1' model became the 'R2' in 1994 and 95. And there was something called the Preferred Equipment Package (PEP) package (?). Oh, and "Chaiste White" was offered as a color option for the first time. There were other minor changes, such as interior plastic getting a new textured finish that was more scratch resistant...but maybe not as good looking as the previous smooth finish. There were many other minor design changes too, like the upgraded 5th gear synchro and shift select spindle, that cured a problem that the 93 models had.
Efini models were only sold overseas and, I believe, all were right-hand drive. Because Mazda stopped selling the FD in North America in 1995, none were ever available here. Depending on the year, some had slightly upgraded turbos and a few other tweaks that increase HP a bit. And the front facia was also changed to include larger air intake for the radiator and IC.
I know theres alot I've forgotten, but that's what comes to mind.
