Yeah, I think the steelbook will be exactly the same, with no difference to artwork or anything, as they aren't console branded. The Xbox one will just be G1, instead of G2 like the PS3 copy.
Yeah, I think I read somewhere on here that the Xbox one holds 6 discs, so that's another slight difference, but only to the plastic inside the steelbook (so 6 disc holders instead).
Obviously the outer box is different, but you've already noted that up above (the Xbox one has the white/green logo at the top of the box) etc.
But yeah, think that's all the info I really know about it haha
Really want to get one, but have no money right now
So will just wait on a price drop
xx