A very good test, FC, which ought to dispell *the myths perpetuating about "venerable" grinders.
Once you get to a certain price, its not the quality of the grind.... but the quantity that counts.
From that price threshold, theyll all grind to the quality demanded of them.... except that the pricier ones are built for commercial application in excess of domestic requirement. And THAT is whats being paid for, not the quality of their output.
Somewhat akin to needing a utility to cart around a wheelbarrow ....but going out and buying a 10-tonne truck to do the same job with the mistaken belief the truck will handle the load *much better.