Brightness and contrast
The Acer Predator Z35 undeniably produces the most light, but none of the models perform bad here.
The AOC Agon AG352QCX performs remarkably well in terms of minimum brightness, and the new LG 34UM69G-B does not perform bad at all either.
Monitors with a va-panel clearly have better black values. Nevertheless the LG gaming models do not perform all that bad considering they use ips-technique.
The advantages of va are clearly visible in the contrast measurements.