I like berserker better. It's fast, hits hard and you only need to pop frenzy once or twice per battle.
But honestly I really like them together.
My Ravager (Zerker/Nalpazca) run was pretty fun and some of their abilities mesh somewhat well.
Don't know what to tell you dude. A high end Marauder is basically just opener+barbaric smash with some escape/shadowing beyond/frenzy in between.
Personally it's pretty satisfying especially at full speed zipping around watching bodies explode.