The soundmod is great but the far away sound fades FAR to quickly. The 991.2 RSR is one you can hear even when it's a good half-mile away at the exterior, and the mod doesn't represent that despite the loud close externals, the far quietness and fade doesn't match up as well. It's the same thing that kills the Audi R8 (Which by far was your best sounding work, love the far externals, it sounds like I actually heard it far away on track. Also that shift was clean, smooth, yet brutal.) It delivers in sound, but the far externals just fade too quickly, getting zoned out by all the other sounds. See here as an example:
https://www.youtube.com/watch?v=HjxsjolOX-4
Look at 0:59 to see what I mean. The Audi Passes by, then gets instantly outshadowed by the porsche and the Merc behind it, then the Lamborghini Huracan passes by and drowns out the next audi. Though while on the Audi Subject I do have a source that may work to make the close externals better:
https://www.youtube.com/watch?v=x9YVAEZJBYo&t=94s
Check out 4:52, 5:01, 1:38, 1:47, 3:10, 3:40
I noticed the close Externals kind of had that far-ish daytona oval type sound stretch, so it ended up kind of muffled and less brutal, losing sound depth. But these should fix the close external on fly-bys, though keep the upshift, it sounds way too great. Other than that, if you fix the sound fade you have an instant 5 for me on both mods. And one last short note if you feel sort of discourage from this review listen to 7:15 of this video:
https://www.youtube.com/watch?v=HjxsjolOX-4 (God that Audi still sounds great despite the fade.)