iPad Air Cases
Does a case for a iPad Air 6th fit a case a iPad Air Two 6th Generation
iPad Air, iOS 9.1
I think you're confusing models
There's
Ipad 1
iPad2
iPad3
iPad4
iPad Air
iPad Air2
So technically the Air 2 is the 6th gen iPad
And on the specs the Air 1 is just a bit thicker than the Air 2
https://www.apple.com/ipad/compare/
And by a bit I mean 7.5 mm vs 6.1 mm
So for a case, hard snap cases will probably have issues, but portfolio cases or silicone ones should fit just fine.