Using a reverse flow utilizes a lower baffle plate which sizzles the drippings and fat. Personally - haven't done a blind taste test of identical meats on tradititional vs. reverse flow smokers on my pits.
Believe the use of properly seasoned woods will be the bigger influence.
Custom Klose Backyard Chef... of Snot, and a 22.5 WSM
Lang 84 Deluxe kitchen, Lang 60 Mobile - The Damsel II, Lang 48 Patio - The Damsel, Bubba Keg Grill - RIP, Double Barrel Smoker and a BSKD