lol, I think the Gintani Sport is even louder than the Remus Race. Based off of my Remus Race, my friend's Gintani Race, and my other friend's Gintani Sport, mixing it in with my poor memory and it having been a long time since I heard the Gintani exhausts, I think it's something like....
Remus Sport, quiet.
Remus Race, kinda loud.
Gintani Sport, loud.
Gintani Race, LOUD.
Personally, I think the Remus Race and Gintani Sport sound really good. The Gintani Race is a bit too loud for my own personal tastes.