The PS4 Edition comes with updated graphics, extra DLC, a new difficulty mode and Special Commentary for all in-game cinematics from the Creative Director and Actors. That's pretty cool!
There's also going to be Preorder bonuses, just so you have more reasons to preorder this.
Here in Singapore, we can get a T-Shirt as a Preorder bonus.
and.. there's also other preorder bonuses according to the folks at CE.org..
A Baseball Cap..
Pretty cool stuff..
According to Playstation Asia, each country/region has a different item offered. However, no one I know seems to know where the keychain and baseball cap is being offered. So, if you are reading this.. do PM or email me if you have any info. Or you can post in the comments below. It will be a great if you have a screenshot or link as well. Thanks!