Recently this Q came up:
If you have two cameras, one with an APS-C size sensor, and the other with, say, a full-frame sensor, AND,
the pixel density (pixels-per-mm or inch) is the same for both sensors (ie: individual pixels are the same size), then
is there any advantage in having the larger sensor?
It is not a trick question. Just remember that the important thing is the equal pixel densities of the sensors.
Let's state that EVERYTHING else about the cameras is the same...