I'd go with whichever is cheaper.
It's the same panel in both. QC on that panel is still shocking (dead pixels etc). Both Asus and Acer have also been complete trainwrecks with the QC on their high refresh IPS monitors. Both have awful RMAs, Asus will just give you someone else's return and Acer are just shit.
Both are great if you get a good one and a shitshow if you don't. So if you're going to run the risk, may as well be with the cheaper option.