Lighter overall, more accurate and better range.
The shotgun is easier for me to secure in my vehicle against a break in (I already have ways of securing both pistol and a shotgun in my current vehicle). Pistol is usually on me 24x7. I am trying to figure out how I can secure one of my custom AR builds as I would be more comfortable having that scoped and keeping a sidearm and shotgun in case I need to go inside a dwelling.
I’m just game playing here with you all and getting a LOT of good input.