Neither one has a strong enough magnetic field to protect us (or life similar to us) from the levels of solar radiation harmful to life. In my opinion, we’d be better served looking to inhabit one of the Jovian moons. As several others have already suggested, how about terraforming Earth for a change?

Shit, I’m just now reading this on August 25th. This means I have to wait another 1000 years to perform a Black Sabbath and summon C’thulu, dammit.