Areas of Use and Limitations of the edge sharpness testers

[KnifeGrinders]

Question of where the EOU edge sharpness testers can be used and where not, has popped up too often through the last weeks for me not to bring it up here.
People seem to confuse edge sharpness and cutting performance testing.
Though there are other makes, a classic cutting performance evaluation tester is the CATRA Tester .

Here's how I see the difference in areas of use between the edge sharpness and cutting performance testers - and will appreciate your input.

Edge sharpness testers use a thin line test media, and the testing action is a point cut.
Cutting performance evaluation testers use a thick sheet test media with a wearing effect on the edge, and the testing action is a depth cut.

An edge sharpness tester tells you how sharp the edge is, which reflects only the 1st phase of cutting - penetration.
Edge sharpness tester scores have no bearing on the blade angle and profile because of that.
A cutting performance tester also tells you how effective the edge angle and blade profile is.

Edge sharpness testers have two primary purposes:
- monitor edge durability of the same blade over time;
- improve and streamline sharpening protocols.

Edge sharpness testers cannot be used to compare cutting performance of blades of varying geometry, and determine which one is superior to another.
Edge sharpness testers can be used to compare performance of blades of similar geometry but made of different steel.

I can put the same sharp hair-splitting edge on blades from 12 to 50 included angle, but they won't cut the same, and an edge sharpness tester can't tell me which will cut better.
Or can?