Custom viewport in different monitors with same resolution problem

I was using my notebook primary display and set to use a custom viewport to use orions realistic bezels. I have adjusted viewport’s x,y,width and height to look fine in my notebook monitor. But now with the same configuration looking at my second monitor 22 inches the bezel is not aligned properly. My notebook has 15 inches running 1920x1080 and the second monitor 22 inches 1920x1080. Shouldn’t it work with the same viewport configuration? What am I missing?