I'd give Bivol a big advantage in defense. He moves his feet better, has head movement and has a very tight high guard.
Have to say Bivol, although GGG has always been a more formidable puncher and much more durable (it’s not even close). However what Bivol did to Canelo and to other guys like Zurdo was special. He’s a defensive master, an expert at dictating the pace, and has exceptional ring IQ. I think he’s shown an overall skillset to be superior to GGG’s.