Discounts on Air 2 have been nice over here in the US (Best Buy $299/32GB, $399/128GB) but those were sold out quite quickly.
Apple certified refurbs, 16GB Air 2 is $319 and it might be a while before 32GB models make an appearance in the refurb store as those were released just half a year ago (recall, launch iPad Air 2 capacities were 16GB/$499, 64GB/$599, 128GB/$699).
At $299 for Air 2 32GB and $329 for 2017 iPad 32GB, I'm inclined to go with the Air 2 for the laminated display and anti-reflective coating. At $319 for Air 2 16GB? Definitely going for the 2017 iPad even if the display isn't as nice. Juggling data on 32GB ain't fun and I expect iOS and apps are just gonna get more bloated in future.