Just evaluating the carving, the No # G&H, the first Hoffman and the G&H with it look to be by the same hand.
The #3 G&H and the #15 brochure are high qualtiy and have the look of Adoph's work.
The carving of last rifle (Hoffman) looks vastly more detailed and sophisticated and I'd be very surprised is it was by the same hand as any of the preceeding rifles.
The maple stock is sub-par for the group with many over-runs in the checkering borders and shallow relief.
I have done a bit of relief carving of longrifle stocks in my time...

(Mike, Without giving all the subjects names or numbers it is very difficult to evaluate them.)
JMHO! Steve