It's best to base your choice on feature sets (price being about equal), since there's really nothing other than historical precedent upon which to gauge the possible sonic quality difference. If someone in the forum can comment on the audible benefits of Denon Link for hi-res audio, that might help.

If feature sets aren't enough, go for the 1070 and tell us about it, if for no other reason than I'm too chicken (or financially unfit) to be an early adopter.