Electro-Harmonix:steel pins, gold pins, platinium


I just want to know if somebody ever had the chance to compare let's say 12AU7, 6922, EL84 in their steel pin and gold pin version. Even the EL84 is sold in a Platinium version. Here i am talking about the Electro-Harmonix TUBES.
Is the difference in price worthed ?
Even the TUNGSOL EF86 is sold in the gold pin version ?
This is to fit in a JADIS JS1 DAC (that i just recover).
The manufacturer comments is: the law in France oblige them to put a production tubes (E-H) in their units but tubes rolling is to be consider......
128x128Ag insider logo xs@2xroccl007