Eddy vs Holley CFM ratings?

It's weird there's still all this confusion when it comes carbs. People have prove time and time again what works.
Street and street/strip Small blocks
Basically go with
350 hp or less 650
350-550 hp 750
550 hp plus 850 plus
Race probably add 100 cfm to each
And in general 750 can be made to work on most street and street/strip engines.