One thing they have in common:

They started powerless in their journey's beginning and had to claw their way to power

One thing that's different:

One has the Dai Li and the other has & is a metalbender

Kuvira: "Don't flatter yourself, you were never even a player."

^^ except this is meant to be a one-on-one fight he's not going to have the Dai Li helping him

I was just saying