This is a good fight i shall say its hard for me to say but mui goku slapped jiren around while gogeta struggled to beat broly at this point we need to c if mui goku or is gogeta blue stronger.

Prior to Broly's most recent movie, I would have went with Jiren. But, in his official debut, his power level was insane.. I think he would get bodied at first, but with the zenkai boost of being pushed passed his limit, I think he'd come out on top.

he has the ability to grow in power over the spand of a fight a few hour fight and he's on par with Goku and Vegeta and obtain supersayian powers in just one fight so yea broly would kill him in one fight