Siemens, Rohre or Halske

Siemens CCa 6922 gold pin,Rohre or Halske, which one is the better sounding?
Halske. Rohre were made later and are inferior quality.
The CCa are proported to be the better of the two. They are priced like the entire tube is made of gold and not just the pins.

Depending the position in your gear for the tube and its function you may or may not be able to tell the two apart though.
I currently have the CCa Siemens Rohre 6922 they sound very nice are the Halske's that much better?