I've only seen a couple of episodes so I'm not sure exactly what he is capable of (I know, I should find out what they can do before starting a vs thread. Sorry)
He is able to turn people evil by implanting them with a maggot-like creature. I think that he cuts himself to extract the maggots, or the maggot has to drink a little of his blood. It then enters a victim's ear.
He's an immortal who was around in ancient Egypt (so he can't die of natural causes, disease etc).
its no big deal, as long as you know some of him its enough to start a versus topic
anyway, spawn doesnt have ears, and is basically the embodiement of evil without actually being an evil person, he's faught angels before (although they didnt use that maggot thing) but spawn would definitely win since i've seen him take down strong enemies pretty fast