Stereo pairing a gold and a silver phantom

[MountainGuy]

If being used in the same room I wouldn’t mix them up. They are not the same speaker so your stereo image will most likely be messed up.

Your stereo imaging will be centered towards the Gold because the Gold is louder by a few db.  So it won't work well.

Also, the Gold has different timbre than the Silver.  Gold is better and more realistic in that it has better resolution and faster transients.

I too wonder what they do with all the traded in Silvers.  I think they probably use it for large scale commercial installations as demos or special rates.