SetsulAcer Predator XB270HU should be using the same panel and is already available and cheaper.
Also neither are in the same price category as the 1080p TN panels OP mentioned.
Depending on the price difference I'd still rather go for the Asus. Acer's product offering is very good but their quality control is lacking. My XB280HK (i.e. at the time pretty much their highest end monitor) has significant backlight consistency issues whereas Asus monitors I've seen have been much better.