If you have both consoles wait for the comparisons before you get it.
That's the plan, but thanks to Bethesda putting on the review embargo there are no in-depth reviews that point out the differences. And based on their track record with PS3 releases I don't have much faith.
I am forced to pre-order a 360 and a PS3 copy from Amazon and return one of them. Or not pre-order, and pick up at a store on release day, which means $10 more and no bonus map.