ITX mobo

[Falcon]

I'm look to switch my Matx motherboard for an itx, to build in a NCase M1.
Currently I have a Gigabyte Z97mx gaming 5 and a 4690k cpu and have been looking for a second hand Z97 itx motherboard without much luck.
Is there much difference between Z87 and Z97 chipsets? I've seen several Asus Maximus VI Impact motherboards recently, and been tempted by one of these. Would I be better off waiting for Maximus VII Impact to come along?

Thanks

 

[Falcon]

Thanks for your reply. Ideally I'd like to stick with the same chipset and go for the Maximus VII Impact, but I've had no luck finding one.