Helius Omega: Standard vs. Ruby & Silver?


Not that I can or would spend $5000 on a tone arm, but has anyone heard both versions of the Omega? Robert Levi tells me it is THE arm for Decca/Londons. Anyone know it's effective mass? You would think Helius would publish so important a spec, but nope. And Dan Meinwald is, as usual, no help.
167c2f8c b422 4e59 92cf 53226ac55842bdp24