It's probably safe to assume ROTHC could be more comparable to Trials of Obi-Wan. Of course we can't truely say that until all of Rise's features have been revealed. Still an expansion that contains a new explorable world and probably costs less than Obi-Wan, I think that's fair enough.
dont know bout that. the planet we got with Obi is about the same size as two large planets in TOR if not bigger, and again we got tuns of new things to make, new speeders and new mounts, a second slot for an extra toon, new player homes, a tun of new quests all for $20 actually here http://swg.wikia.com/wiki/Star_Wars_...als_of_Obi-Wan
there is a link that tells ya some of the stuff we got for the same price as what they charging for TOR's new expansion