I use my Rowland Coherence II preamp, which is fully differential balanced, to feed a darTZeel, but I want to make an important point. The "Version 1" DarTzeel had XLR inputs, but merely for convenience for those who had balanced cabling - it was essentially a single-ended input (I can't recall what Herve did with the third PIN). The Version II, on the other hand, added input transformers at the XLR connections. They provide the advantages of noise cancellation inherent in balanced cabling, but they are still terminated into a single-ended circuit.
Herve advocates first the 50 Ohm connection, which was designed for use with his darT preamp (I have a set of 50 Ohm cables that I have used because my Rowland has a 50 Ohm output impedence, but I think they were loading down the preamp too much and I went back to balanced). If that is not possible, he suggests the single-ended inputs. The last choice would be the XLR inputs, which he does not prefer because, like all transformers, they put a lot of wire between the interconnects and the input circuit - he says the single-ended input is cleaner.
In any event, yes, the darT can be run from a balanced preamp, but the Version 2 is better set up for it.