In this first image, I have left in part of the letterboxing, so you can see the basic black level more easily.Immediately below, from The Fifth Element, our favorite starship image. First we'll start with the HD250 (converted to grayscale) slightly overexposed, and below it, the Sony VWPro1 competition.
Comparing the JVC to the Sony, immediately above, the JVC is definitely doing a bit better blacks on this scene. Keep in mind, while this is a space scene, it's not an extremely dark one. There are plenty of mid brightness and some very bright areas, unlike, say, the Casino Royale night train scene below, where there definitely seems to be parity.
For the rest, of our comparison images, they are well overexposed, some have been converted to grayscale for your convenience (the slight purplish-red color varies a lot from one projector's image to another, so grayscale makes it easier to compare: