Yeah, the original dream version is simply the intro mix counterpart of the original beat version. He should've labelled it in a more clear way. This reminds me of the Signum Intro Mix of Healesville Sanctuary, which was given the name of "ASOT 450 Extended Intro Mix", which ignores the fact that there are two original mixes. Original dream makes it sound like it's an ambient version, or that it's an uplifting mix (which the original beat version already is). Anyway...
For me, the original (without the intro) and the Markus Schulz remix are the best, but I haven't listened to the Gai Barone remixes yet. Either way, whatever version you prefer, you can't go wrong with a melody like this.