Personally I don't think these deals make a very big difference in sales between versions. I think maybe at the launch of new consoles having something like exclusive content and putting in the tagline "the definitive version" next to your console's copy could be big if that's what a person is buying the console for like with Watch Dogs, but honestly the actual impact will be negligible. Exclusive games from first party studios is what makes the difference. Also price and controller. These are the 3 biggest factors for most people that I've asked.