Side to side luminance difference. It's not bad but doesn't tally with the SpectraView certification report. Anyway, it's going to be looked at. In all other respects it's a killer monitor ... the best I've owned.
I take you got one of the special European spectraview quality certified ones then?
Anyway is the side to side luminance difference still bothersome even with Comp on say level 4?
I don't really see any that appear to test much better on prad.de compared to mine at comp 4. The numbers I measured seemed, at comp 4, a lot more even for luminance than most, close ballpark to the EIzo Coloredge data they took and noticeably better than their Eizo flexscan measurements.
First copy had a horrible backlight bleed upper left, it seemed like it was just up along the edge but it actually subtly spread across the entire screen and it measured noticeably higher black points and lower contrast ratios. Second had more side to side brightness differences though. I also peeked at a third, less side to side when at comp 0-2 but not quite as even at comp 4 and it had some faint cloud sort of bands when looking at solid colors around 15-40% brightness so overall I decided the second copy was the best. Without the nasty bleed across the screen that killed the black levels the first copy would've been best, no clouds and quite even looking even by comp 1.
Second one has a trace of upper left backlight bleed but it's pretty faint and doesn't wash out black levels, they measure at least as good as the numbers I see on any test sites. On comp 4 my screen looks very even whether I display a solid screen of 40%, 80% or 100% gray/white. It would be nicer if it didn't have the side to side at lower comp levels, but even by level 3 it's already better than any monitor without a compensation function and at level 0 it's not really any worse than any typical run of the mill monitor.