The truth cable is stiffer and tougher and more prone to memory effects. As for micro phonics I heard it has less than the fat cable. As for sound sig I find the non truth version warmer and fuller. The truth version has more air and extension and clarity , at least to many who have tried it. I personally found the truth to be a bit hollow, but most impressions don't quite match my opinion on this. Most impressions seem to find the truth having a larger soundstage and deeper extension as well.
I personally find the midrange of the dots to be a tad too recessed at times when listening to certain vocal tracks. This I would pick something with a smooth sweet and more pronounced midrange like the fitears (if memory serves me right). The JH13s also have a very special midrange tone which I cannot quite pinpoint, and I do not know if I would enjoy it in the long run. But it does seem like an interesting choice with an expansive soundstage and impressive imaging.
Another option you might consider would be the heaven V or VI. I personally preferred the V as it sounded fuller. Or the Lab 1s which really sounded special to my ears. Again, I do not know if it would be endearing in the long run, but it is very special, and I would love to have more time with it too. The midrange isn't as natural as the ditas or the fitears, But it is unique.
Having said all these, these suggestions would hold only if the midrange is what you might find lacking on the ditas. To me, everything else on the ditas are simply class leading.