No subject

WIll Fyfe's "I'm 94 To-Day" / "I Belong To Glasgow." I already have a 10"
version on Regal Zonophone. Can anyone tell me whether one of these is
considered more collectible than the other, for whatever reason?

And a more generalized question: I gather there are labels one would always
try to buy, e.g. Black Patti. Is there a list of labels one might as well
routinely avoid? I believe I've recently read here that Cameo and Lincoln
were thought of as copy labels. I never buy Tops, for more or less the same
reason. Are there others to judiciously neglect?

As always, many thanks,
Rod