really curious what the difference is between the GoG Dragon Age: Ultimate & the Origin DA: U is. the GoG DA: U is 23GB (im assuming after install) but the Origin one is only 8GB, 15GB after install. i mean, 8GB is a helluva big difference.

Sure you installed everything/activated the DLCs in Origin? I remember it being about 23-25GB there as well

EDIT: Just checked, i think the 15GB is just the base game, at least the size doesnt change when i deselect all the DLCs, guess Awakening (and the rest) is about 8 then

The Ultimate Edition on Steam and Origin do not have included the Deluxe/Collector's Editions content, nor the promotional items. GOG edition has those included. Plus: DRM free and no dependency to a client. So GOG edition is actually a complete edition., including all the content that was available in various editions.