>>4292279Well for a start they're using different metering systems. With the OVF there are separate metering sensors, there's a limited number of them and they only cover certain areas of the frame. In live view the camera sees the entire frame and can in theory meter on a per pixel basis (it won't, but it'll be much finer).
As well as that there are probably separate metering modes depending on which viewing method you're using and maybe a setting to link them. I'm not sure, I only had one live view capable DSLR before switching to mirrorless and rarely used it because the screen was small and shitty.
