I've got a Ten Thunders crew.
What you'll find first is that Malifaux models are actually quite all over the place in terms of scale anyway. I have a set of three Samurai, and one them is kneeling, but it still the same height as one of the standing models.
Overall, Malifaux models are slightly taller than 40k.
That said though, I don't think that would be bad for Dark Eldar. If you want I can try to take some picture for you sometime?