I've still got both the Note 8 and the V30. I had the S8+ for 5 months prior to upgrading to the Note.
I think given what you said about the edge bothering you, you know the answer. Personally I love the edge. On the Note, it's far less pronounced, but I loved it on the S8+.
The call quality is about the same on Band 12 LTE (Voice over LTE for T-Mobile). The V30 is the only one of the two to support T-Mobile's latest band for rural areas, but since you're on AT&T, that won't matter.
I've had more weird Bluetooth issues with the V30. It sometimes randomly disconnects from me car (2017 Golf R), my Beats X headset, and my Bose QC35s. So I do think it has less stable Bluetooth than the Samsung.
Batter life on the V30 is better, particularly standby time. The screen on the S8+ is somewhat nicer, but the V30 is more than good enough.
If you like audio and have good headphones, the V30 has no competition in the market.
For instant photos where you don't have time to think, just quickly pull out the phone and snap a photo, the Samsung wins every time. If you have a bit more time, you can get better shots out of the V30.
The only other complaint I have about the V30 is that it feels extremely light. Too light for me, but I'm putting a heavy case on it to make up for that (Spiegen Tough Armor).