To tell if you have an LSD: jack the rear of your car up so both wheels are off the ground. Rotate one wheel by hand. If this moves the other wheel as well than you have an LSD. If not, single spinner.
Type-S - what does it really mean?
For example I have abs, airbag, (had) hicas, sunroof, lsd, (had) the flap in the exhaust, red GT badge, and a series II motor.
But i didnt have sideskirts, rear pods and just had the standard (non type m) front bar. is mine a type s?
Back on topic I believe brakes are the same accross all GTS25s