By the way guys, you can't use the comparison that because Riku's hair is short, it's post-KH2 Riku...
In KH1, Riku's hair was also short.
If you compare RoS Riku's face to Post-KH2 Riku's face, you see that they are different. Post-KH2 Riku looks more mature in comparison to Riku's face in RoS.
This means that Riku and Sora go back to as old as they were pre-KH2, in the RoS. Even Sora's face matures somewhat in KH2, compared to KH1. In the RoS, Sora's face looks like as it did in KH1, Re:coded, Days, etc.
Same as Riku.
Therefore, you can't use the comparison that because Riku's hair is short, it's post-KH2 riku..
A few of you have been using this and it's completely invalid.
Here's a pic just to prove my point. RoS riku looks younger, Post-KH2 Riku(with cut hair) looks older (facial features make him look more like a man than a boy)