Galaxy/Note comes out every year, there's a new OP every 6 month. I'm not even sure how they manage to keep up with that business model.The OP3T never included much over the original OP3, the OP3 was not obsolete. But how is that any different from Samsung phones like the Galaxy S and Note series?
The change to the OP5T is a little more obvious due to the display but otherwise I doubt there will be much difference.