I think all of these surviving pieces are absolutely wonderful and I especially think the current owners who permit them to be displayed for the rest of us are also wonderful.
This being said, I think a fairly strong case could be made for the Lion/Lamb being an early Oerter rifle and I do not think the two tailed dog is a CS rifle at all - I think it's a period, regional (Northampton County) 'copy' of what was likely a style for a couple of years in the 1760s.
The gunshop at CS was not the only place manufacturing arms in Northampton County in the 1760s. Within such a regional , tight market, one has to assume that everyone working in the trade was surely aware of what each other was doing, and subsequently making what was 'stylish' to sell.
JMHO! For the sake of conversation.