Hermes---- I have looked at different color bikes online and when I switch colors the look is different. I think it is just the perspective of the picture that makes it look different. I agree with you though that this one did look different too.
As far as the OP is concerned I would say she is getting the bike she wanted, ZW4, as far as components are concerned but the color and the fact that it is/was a lesser bike,ZW6, as sold.
All in all she will have a good bike but that nagging feeling of why didn't I get what I "wanted" will be there.
Like mine, I do love it and ride the heck out of it but I always wanted a black one. Some day when I upgrade, no buy another one to add to stable, to a different bike it may be black, or not!
OP....I hope you get what you want and enjoy whatever you get. Either one is a great bike...enjoy it and the rides you do with hubby on his new bike.