But since you are or seem to be rev and ball speed matched, wouldn't you also need a tester who is speed dominant and then one who is rev dominant to do a test whose results cannot be disputed???
You could try a lot of different things to see what the results are for each no doubt.
I only give the simple assumption that throwing each over a series of shots if there is such a true difference should easily be seen.
Nothing more nothing less. Not saying it is perfect, but if marketing is correct then shouldn't we see the obvious?
I think/believe that the differences between speed dominant and rev dominant can show a significant change in what the reaction difference is in more than just the differences between solid, hybrid and pearl. I know that different surfaces can show reaction differences between degrees of grit levels (1500, 2000, 3000 & 4000) and between different levels of polish for rev dominant types, while speed dominant types see only 2 differences, dull and polished.
More than one manufacturer has introduced a ball, which wound up being a hybrid, but was not "MARKETED" as a hybrid. While some balls are there just for the marketing hype, I believe and think that more than one is there because the manufacturer saw, via testing, that there is a difference among those 3 types.
As a simple example, I think that speed dominant types will see little difference between a polished Hy-Road Pearl and a polished Hy-Road Solid, while rev dominant types will see a true and real difference between them.
Because you as a matched rev/speed bowler do not see the difference, does not mean there isn't a difference.
"The eye of the beholder"