Xbox 360 requires you to buy an $80 dongle to get wifi access, PS3 has it built in.
Xbox 360 requires you to pay $50 annually
to play online, PS3 has free online play.
Xbox 360 forces you to buy random amounts of "points" in odd amounts so that if you buy anything that doesn't cost exact increments of 400 points, you end up having points sit around unspent forever, PS3 uses exact currency amounts, added as you need it.
Xbox 360 wireless controllers require you to buy a battery pack and charger/charge cable or endless AA batteries to use them, PS3 controllers come with built in rechargeable batteries that can be charged with any USB mini cable.
Xbox 360 arcade had absolutely no hard drive, requiring you to either buy an overpriced and microscopic memory card, or an overpriced hard drive in order to even save or patch a game, and only very
recently allowed flash drive support, every PS3 SKU has come with a hard drive, all PS3s have had flash drive support and several have also come with memory card slots in addition to their hard drives.
Xbox 360 and PS3 games cost exactly the same price on launch, so I don't really know what to make of that comment, unless you're referring to Wii games, which are inherently cheaper to make than 360 and PS3 games due to the lower quality graphics on the Wii meaning less production time in most cases.
In 4 years of owning a 360, it cost me over $700, in roughly the same amount of time, my PS3 has only cost me $300 for more
How are Sony the ones that have their hand on your wallet?
But on topic: The game does look somewhat interesting, and I may try it at some point.