Switches in same Cab - Difference between Copper and Fiber?

This is probably an age old debate, so whats the real truth regarding copper and fiber performance on a small run?

I'm talking two switches, in the same cab. I know that ultimately fiber will almost always perform better, but when the copper run is 0.5 metres, is there any noticeable difference at all if you were to connect these switches with copper instead of fiber?

Thanks