The point is if the cards actually meet spec and if they behave differently on the RPi.
So the first step is to show how the cards behave in an environment with no artificial performance limitations. This is the baseline "peak performance".
The next step is to show whether the RPi's performance ceiling is below that baseline, or if any specific card behave particularly poorly on the RPi. 2 cards may be equal on a high performing machine but for some reason have big differences when running in the RPi.
So the first step is to show how the cards behave in an environment with no artificial performance limitations. This is the baseline "peak performance".
The next step is to show whether the RPi's performance ceiling is below that baseline, or if any specific card behave particularly poorly on the RPi. 2 cards may be equal on a high performing machine but for some reason have big differences when running in the RPi.