Because I like the idea of white court vampires better, and that chiang-shi/chiang-shih/whatever were known for sucking "life-force" more than just blood, I made them emotional vampires like the WCVs.
Inhuman strength and speed probably is enough for them to cover the legends ("rip a man's head off"), and as some legends have them blind (they sense you by your breathe, so if you hold it you can avoid them) and afraid of loud sounds, it makes sense to give them supernatural sense: echolation. Plus, it's cooler than just stating them the same as WCVs.
Despite most of the myths of them being similar in weaknesses to regular vampires (BCVs, here), salt, garlic, sunlight, running water, ect, i stayed with the WCV catch.
So, erm, basically like WCVs? My big thing is that they are usually less charmers and more monsters, angry on their best days. So, while it is not a refresh power difference, they play entirely differently. They aren't so slick and political. They are more like BCVs in this; they don't resist their temptation. Hunger only serves as a guide for when they HAVE to stop doing other stuff and actually eat. There are no Thomases, no half-ways, no good guys. They aren't born the same (well, some legends say they are the souls of people who were so mean/powerful that they crawled right back out of the afterlife). Their natural state is somewhat monstrous, with long patches of white hair growing from irregular places on the skin. This is hidden by human guise. Lastly, without any real guide, i just made their blood some nasty yellowy-orange-pus type mess.
As they progress, the open up into flight (common for most types of asian vampires), shapechanging (wolves), and "dark magic" - whatever that is.
