I can see the 'minor' difference in the Zoo range, but its had the same design since it first came out, (I mean where the top tube meets the seat stay(I will try and find a picture to show you what I mean)), a lot of other companies have used the similar design in the past,(koxx and onza) and they no longer use that, because it tends to be heavier, as its a little more complicated, than what you get with a simpler design. I think i just like to see companies try new things, and push the design limit, to try and make it look different and lighter. I think all Deng frames are always going to be same, because Deng has no imagination.... example, he comes out with a 24'' range and makes it the spitting image of the 26'' range!
Also the BB thing is just stupid!
I agree with Ali, why are companies not coming out with +30mm and lower bb's!!! GRRR!