Exhaust is a very subjective subject. You will get many different answers. From what ive read/seen here and in Facebook groups, most who do just a muffler swap have drone. Those who do full "cat back" systems are happier with their decision.
I love my Borla ATAK. It's not loud inside the cab, except when accelerating hard, and has zero drone that I have encountered. Yet, it's loud outside when you want it to be. When I drove down last Tuesday to drop my truck off at bumper shop, my wife was following me. At one point she was three cars behind me, so Id say at least 1/8 mile back, and was still able to hear when I accelerated to pass a vehicle, but inside the cab I was still able to hold a normal volume phone conversation with her