I've been having a really close look and comparison between the two. While the $1400 difference can be explained, I wouldn't consider the Trance 1: $4200 for an aluminium frame is getting on the high side. Interestingly a Trance 1 is 12.8kg and Trance 2 is 13.15kg, so there's bugger all practical difference. OK, it has carbon wheels, but even they are a little misplaced on such a bike at this level. All up I think it's got an unusual mix of components. Ordinarily I usually see a really good reason to buy the more expensive bike, but not in this specific case.
In short, if you are happy riding a Trance with no dropper post and run tubes, I'd say the Trance 2 is better value. Of course you can always go ghetto tubeless later.
I would either spend $2600 and get the bike for what it has, or, jump to an Trance Advanced and expect pay more money, but money that makes more sense in spending. The middle ground that the trance 1 is in I'd bypass.