I'm kind of leveling a Barbarian and a Crusader in tandem with the new season on Expert. My Crusader can just ride the horsey into the middle of a pile of enemies and just spam hammers and everything explodes while my Barbarian can leap into a pile of enemies and die horribly. Both have relatively even equipment, but the Barbarian has a pair of legendary bracers that increase Hammer of the Ancients speed by 50% and damage by 200% while the Crusader doesn't have anything unique like that (both are using legendary weapons.)
I mean, I guess Crusader would be less potent if I wasn't spamming hammers and was instead using a different Wrath spender, so maybe it's just a matter of finding the gamebreaking combo with the Barbarian? Or does Barbarian really start to pop later than the Crusader?