It seems to have a larger field of view. Hololens (I have one) is about the size of a credit card held out with your arm half extended. This one is the size of a VHS tape. Also, the unit appears to be lighter as processing is done by a pocket computer that comes with it. Hololens is completely self-contained and thus heavier and less comfortable. I wonder if they'll use the same Unity/C# dev tools.
VHS tape with arm half extended is actually the exact size I calculate for hololens, given the field of view of the hololens is 30°x17°, and an outstretched arm's distance is 35cm:
