^But there really is a point to splitting hairs over service. Especially if your comparing the two different companies. MS has always charged for online gaming (in my opinion the most important and main point of having a system online), as well as Netflix. Where Sony has no plans to start charging for those services.
Not what they will charge for, we have no clue. My guess would be demos for all games or exclusive betas. Maybe even Qore thrown in, with some free giveaways for good measure. But as Sony has already stated, what is on PSN as of now will remain free. Not everyone will get this new premium service, as it's not required for online gaming. But Sony will still get extra income they otherwise would not have from the few who do wish to have the extra features.
