FYI Berserker is one of the republished classes in the 2024 rules, new version does not have exhaustion when you end your rage anymore.
It’s in the free rules so anyone can read it here:
https://www.dndbeyond.com/sources/dnd/free-rules/character-classes#Barbarian
That’s a good question, both are eating pretty good in the 2024 rules.
I’d probably have to math it out to see what actually would have a higher eDPR.
Champion is gonna have more attacks, higher crit chance, heroic inspiration every turn
Berserker is gonna do rage damage every attack, plus frenzy damage (rage damage bonus # of d6s to the first target each turn)
I’ll do the math when I get a chance