Although, being a pedant, I would have to point out that's only valid if the arm masses are close. A cartridge's low frequency response depends greatly on the arm/cartridge resonance, so these have to be very close or the bass will be different. It also assumes identical phono stages, as with a MM cartridge, the capacitative load affects the HF response. Then there's the question of arm resonances if the arms are different...I agree. That's a much more practical (and easier) way to do it. And if you're just comparing/evaluating the turntable I would use the same cartridge in both turntables. As well as eliminating the cartridge as a variable that would automatically give you level matching.
But you have to be a "rational-scientific audiophile". A lot of audiophools think digital is flawed.![]()
See where I'm going?
That's why I have never trusted even the technical reviews of turntables back in the 1970s when these things were done.
As far as I'm concerned, all a turntable has to do is to go round at the right speed without too much rumble, wow and flutter. Everything else is due to the local conditions of arm, cartridge, mounting and positioning.
S.