Hi Crazy Bill,
"Real Data" for tonearms......🙏🏽❓
We do have data for cartridges....and for amps....and for speakers.....and even some vague voodoo mumblings for interconnects and power cords....yet that doesn't negate the need for 'subjective listening' (preferably in one's own system).
Now you want 'data' for tonearms....⁉️
I think this is last bastion of audio componentry which has NEVER had acceptable (agreed upon) objective testing criteria.
I think with tonearms.....'time' is the real Referee and that's why arms like the FR-66s and 64s, Micro Seiki Max 282, SAEC WE-8000/ST, Dynavector DV507/II, 505, 501, are still in demand world-wide...even against the very best and latest modern iterations.
There is a large group of audio aficionados who admire the FR-66s and there is a small band of audio aficionados who perceive some flaws.
Only you yourself can decide.
As Detonarm has written many times....the FR-66s is the ne plus ultra of tonearms in his vast experience, and in the opinion of Dietrich Brakemeier of Acoustical Systems who has designed the Axiom tonearm
http://www.arche-headshell.de/tonearms/the FR-66s is still the finest tonearm ever made.
Now HE is one True Audio Expert I have faith in....👍