I've had a Dell U2312HM for a while now. As soon as I got it I calibrated it according to a guide, which used professional tools like a spectrophotometer to get some convincing color settings.
I've been pretty satisfied with it so I decided to get another, but after giving it the exact same settings it looks very different and wrong. On the old monitor white looks white. On the new one it's dim.
I tried correcting it by increasing the brightness, but I feel that throws other colors off. I also tried swapping cables to see if it was the GPU port, or the cable itself, and I made sure they had the same settings in the Nvidia control panel.
Is it normal for the same panels to have such variance? Do monitors need a break-in period? Or is one not functioning properly?