E88CC and 6922 are the same thing. ECC88 is the 6dj8 and E188CC is the 7308.
Of those you mention, all can be very quiet. Differing testing parameters and the vintage of particular tubes render your question almost impossible to answer. If early-60's Siemens and given good microphonics, they will be very quiet. I think the best all-rounder of those you mention in terms of a nice house sound with good extension on both ends is the PQ USA White Labels. Of course, tubes are component dependent. It is always a crap shoot, which is why tube rolling is both popular and expensive.
Stick with a reputable tube dealer, when possible. If buying from a private seller and they are listed as "matched" or "tested", ask for the results and get it in writing that you can return them for a full refund if they prove less than what is advertised. Good, honest tube sellers should not have a problem in this regard.
Of those you mention, all can be very quiet. Differing testing parameters and the vintage of particular tubes render your question almost impossible to answer. If early-60's Siemens and given good microphonics, they will be very quiet. I think the best all-rounder of those you mention in terms of a nice house sound with good extension on both ends is the PQ USA White Labels. Of course, tubes are component dependent. It is always a crap shoot, which is why tube rolling is both popular and expensive.
Stick with a reputable tube dealer, when possible. If buying from a private seller and they are listed as "matched" or "tested", ask for the results and get it in writing that you can return them for a full refund if they prove less than what is advertised. Good, honest tube sellers should not have a problem in this regard.