My $.02:
Old xB - so ugly it's cute.
New xB - so ugly.
It's not much different but there's something about it that I just don't like.
I also looked at the specs and it's now rated for 28pmg on the highway, vs the old xB's 34. I was expecting the new EPA rating system to drop the numbers some but this seems like an awfully long fall. I'll be curious to see real-world experiences.