With the list of various exclusives, I happy I've got a PS3.
The lack of gameplay difference between Spidey and GG2 has caused great debate here. Well IMO, the extra will be great.
Despite being an extra skin, I thought GG's inclusion in Spider-Man1 was cool, and this will be the next step.
Free flight is more of a different direction than people think. Whilst swinging with Spidey, gravity is still a factor, and you can only swing if you are appropriately anchored.
Flight is totally different, more free, and the Six-Axis is a great control method. Imagine swooping throut the New York alleys or flying direct to Liberty Island? If anyones seen the Warkawk (i think) demo, then they'll have an idea of what this could be like.