Borla = Boomer. Loudest, meanest, nastiest, drone-monstor, esp on GTS. Cheapest. Worst fit/finish.
Belanger = Deepest Muscle-car tone, made out of muscle-car material, alumanized steel. Less drone due balance tube.
CORSA is no resonance, no drone, best fit/finish, awesome tips.
Best 'value' easiest to install. My #1 seller.