the 93 cobra t5's were only better because of the pocket bearing at the input shaft. It's not a night and day difference though. 90-95 v8 t5's were all indentical in power ratings. In fact, the v6 cars possibly up to present day are still the same.
the 83 and 84 t5's are NOT a world class, and are the weakest t5's made.
but ****, it's still a 5 speed