Awesome thanks. I wasn't sure if some of the features on the banish like the 7 or 9 length would be useful or not. I highly doubt I'm going to be able to tell the difference so I was curious. Thank youI'd probably take the ultra 7 and I'm not even a TBAC fanboy, I think its just. better product from a better company. If I was going to use the can for rimfire or something, then id take the banish 30 since you can open it up and clean it. Honestly though I found that I never use the extension for the b30 so I've never used it in the 9" setup (nor have I ever wanted to) and I've never taken it apart to clean it. Since I don't use those features, I'd pick one without those features.
As for sound, I can't tell a difference but my ears aren't finely tuned decibel measuring devices either. I also have the banish 22 and a deadair mask 22 and I can't tell a difference between those either on my 16" tikka t1x. I guess I'm not really convinced that theres a huge difference between any silencers that fall in the same size/class etc.