A user on NeoGAF has posted screenshots comparing Kingdom Hearts Birth by Sleep on PSP to the 2.5 HD version on PS3.
Kingdom Hearts Birth by Sleep was originally released on the PSP only. Since Square Enix is releasing Kingdom Hearts 2.5 HD on the PS3, this will be the first time the game will be seen in glorious HD.
Obviously the differences between Birth by Sleep on PSP compared to the PS3 are obvious. The game looks much smoother than ever before.
You can check out the comparisons below: