So I tried alongside the Asus iiyama VE278Q and B2776 HDS.
Result 2 very good screens, with a clear advantage in contrast to Asus, the colors are more vibrant. The general look (yes that's important :) looks better also in the Asus.
Games Level 2 screens are the same. Ergonomics, small advantage for the Iiyama with its adjustable foot (slightly wobbly).
The star less: A slight hiss due to LED is heard depending on the brightness. I had 2 Asus VE278Q hands and colors were not the same, slabs waltz ???
My final choice will be the Asus VE278Q.
PS: on 3 screens 0 dead pixel