I am doing to pricing comparison to pre-order a couple and now that I have both PS3 and Xbox 360 consoles, I am running into a problem on decide which version to pre-order. Should I pre-order both on separate orders and and then cancels which is the most crap or how should I go?

My rule is that I get most online games on ps3 only because most of my mates have ps3s. Anything else... if it's cheaper on xbox 360 I'll get it on that. My xbox 360 is chipped.

Mine are about 50% each and the pricing the games I am looking is the same for both versions

Check to see if it's a Bethesda game with expected dlc's first?