I think high end turntable comparisons are hard to come by, unless you have a very accommodating, connected dealer or access to someone who owns several high end turntables. I compared a Kuzma Reference Triplanar arm with new Lyra Titan i to a Kuzma XL/Airline in my system, using the same cartridge. It was a revealing presentation, mostly in what the better table "didn’t" do-- it was artifacts that were missing from the better presentation.
Play a lot of different program material.
How do you avoid the issue of a cartridge that matches the system voice working better on one arm than another?
Lots of variables. Very few opportunities to drill down and compare directly in a controlled environment.
And the differences may vary depending the LP-- which leads you to set up changes per record, something most people like to avoid.
No answers, more questions.