I am already stacking the shots, as are the photographers I'm comparing to. It is also objectively true that noise is lower on FF cameras, specifically at higher ISO. You can see many comparisons of this online. The A7sii has larger pixels that gather more light compared to either the A7rii or an APS-C sensor.
> It is also objectively true that noise is lower on FF cameras, specifically at higher ISO.
This is a meaningless statement - there are too many free variables you’re ignoring.
How large the pixels are is not all that relevant for how much light can be gathered - the actual physical constraint is (the angle subtended by the sensor & lens * physical aperture diameter)^2.
