Eddie is a big guy who moves well for his size but his balance while moving is bad and center of gravity is all over the place because of his huge midsection.
Yeah, but as bad as Eddie looked sparring in that clip, I saw a couple clips of Thor and he hasn't a clue. He boxes southpaw and that could be a plus, but he crosses over his feet as he tries to get close to his opponent, throws with no snap or power from the floor up with nothing more than arm punches. He is also wide open for counters from what I saw.
His big plus is his sheer size, but if I had to pick a winner between the two from what I saw in those few clips, I'd have to go with Eddie.
Either way, it won't be pretty.