Byrds striking looks much better than Stewarts and Stewart looks poor enough on the ground. I think Stewart is pretty bad overall.
Honestly I'd have to agree. Stewart has this faux-technical style where his striking looks crisp but with 0 precision and mediocre defense. He swings at air a lot. It's like he spends most of his training time hitting a bag alone instead of sparring.
At best for Stewart I see it being relatively even on the feet with a big grappling advantage for Byrd. But I won't be surprise if Byrd can outland him.