hmm, I suppose that given that Malorum is a Grand Inquisitor may imply that he's powerful, but that's just speculation on my part.
I'd say it's an even split in a duel. Although if Kanan uses Jar'Kai it may push things to his favor
In a force fight, Malorum has nothing on Kanan.(no seriously, Malorum has no force feats)
So, i'd give it to Kanan 6-7/10 rounds. He's more well rounded then Malorum.
Well Fated it's a strict saber duel since Malo doesn't have any real Force feats, probably should have added that in incase no one knew he didn't have any, but oh well. Kanan just has his saber here. Malo though was a pretty good duelist, only losing because he wasn't focused and scared of not becoming a Sith.