True, Chappers has a an unusually good set of ears but not infallible ears either. And not a single human alive can avoid unconscious bias (formed from all the stuff we've ever read about what one wood sounds like vs another) when we know what we are listening to.
Warmoth did some great videos on their YouTube channel where they demonstrate if you swap an alder body for ash or mahogany, different neck woods etc, while truly keeping everything else the same. Nobody has done comparison videos as well as they did, BUT I strongly recommend watching the videos blind, i.e. listen rather than watch them. The differences are smaller than you might think, even negligible, when you don't know what you are listening to.