Yeah, I'm pretty much in the same boat as Morrus. I originally played Traveller in the 1980's, thus the original game, and I recently purchased the Mongoose Traveller and 2300 campaign setting, mostly as inspiration for a sci-fi game I working on for a home game (not intent on publication) that is largely Pathfinder and nothing like Traveller at all. I don't hold the Traveller ruleset as anything better than any other ruleset, which I have little interest in. I purchased Traveller for the fluff, not the crunch. Traveller holds little nostalgia for me, despite it being one of the first sci-fi rules I've ever used. I don't think I can help much in your goal of choosing the "better" set of rules - I have no opinion on this.