When you mentioned it, added new comparisons:
http://www.wowinterface.com/forums/s...6&postcount=30
These are indeed the short form versions only for code changes, handy when you need to know if certain code like API how their usage change, e.g.
Full comparisons are huge, like 60MB html, I can add a live to latest PTR in a zip to this post for you to check if you like.
*Edit*
PlayerHasHearthstone() returns the item ID the heartstone item, probably noticed it wasn't smart keeping one id hardcoded since players now got the innkeepers daughter and probably more HS to use in the future. :3