The fact is nobody can answer this question because the Galaxy S III (or whatever they call it) is complete speculation at this time. Even after it's announced you can't be sure until it's out and people start giving feedback.
Galaxy S3 would be more advanced since is going to be launched in May. Sammy must have planned something big & good for their next Galaxy handset. I will be not surprised if S3 comes with a quad core processor and superior screen. HTC one x already has quad core processor and Samsung would definitely release a handset to compete with them.