From what I heard and remember hearing correctly, characters that are leveled up through the PS3 can be transferred to the PS4 version (assuming that both consoles have the game).
So what if I wanted to go back to the PS3 version with some friends? I only have the PS4 version at the moment–would my PS4 characters transfer over to the PS3 side? What if I wanted to go to the 360 version too to play with some other people too?
Best Answer
Yes, your Destiny characters are possible to use on both Xbox 360 and Xbox One, and PS3 and PS4. But your character cannot transfer between systems. Either its between Playstations, or between Xboxes. As DualShockers explain here in an interview.
But when it comes to the playing itself, you cannot play on say your PS4 with friends who are playing on their PS3, as PlayStationLifeStyle.net explains here.