Funny you should ask.............
I've always had Borla mufflers on my '94, but decided to add Roe high flow cats to reduce the side sill temperature. At least, that's what I told my wife. Secretly though, I was hoping to see (or hear) some increase in the exhaust "tone".
Immediately after having the cats installed, I wrote Sean that I could not hear any difference. His response: "Wait for a few hundred miles".
Well, it's now been 2 weeks and 400 miles and it is indeed louder.
But, it's apparently not apparent to my wife who hasn't said a thing! So. I've accomplished both my goals and still have my auditory acuity as well.
Don