Is this ram compatible for this motherboard ASUS Z170-AR LGA1151

Solution
The second set 2666 is 1.2v which is jedec standard and more likely to work. The motherboard has to support the higher voltage of the first at 1.35v for the 3200 Ram to work.
I would suggest it because it would make upgrading to a new motherboard less problematic. Jedec spec memory usally has a lower risk of memory being DOA. Least that is the way is seems but could also be the fact jedec simple works for all motherboards.