Not to say the Harbinger isn’t tanky either, but it can’t handle the turrets quite as well. I also don’t mind it for bunkers and such because it can tank shots from the turrets if need be. In terms of applying to gameplay loops, if I need to be jumping around to lots of places for doing bunkers and being a loot goblin, the redeemer with an XL-1 will take you lots of places.
Mostly echoing what other people have said in terms of handling and such.