That's not really a gaming monitor. It's a 3D monitor that they decided they could market towards gamers as well. It was not built from the ground up as a gaming monitor. In fact, the product page hardly mentions gaming at all, except that you can play games in 3D.
Compare that to the VG248QE product page, and you will see what I mean. Even if you throw the 144hz out of the picture, it specifically states lower latency, low response times, etc while the one you linked doesn't even have a single mention of response time which is a very basic component to a gaming monitor.
http://www.asus.com/Monitors_Projectors/VG248QE/