Now that GULTU is trading on its own, it should be somewhat easier to compare the value of the two trusts and take a stab at which is over- or under-priced relative to the other. After discounting all known factors on both, they should eventually trade pretty efficiently relative to each other. And I think that gives a big boost to TISDZ since it will have a more actively traded proxy for itself.
If I were guessing (and that's all it is for me at this point), I would guess that TISDZ is cheap and GULTU is dear relative to each other. Hopefully they're both cheap relative to the overall market since I own both is my paltry account.