A closer look
Comparing recesses, edges and backs under consistent light can be more useful than comparing fronts alone. Similar relief invites further comparison but does not independently prove the same mould, batch or maker.
How to continue
Continue looking: write down visible details and keep interpretations in a separate column. Record viewing conditions, the photograph date and missing information. Revise when evidence changes, so the next reader can see what supported each judgement.
Scope: this is an editorial close reading. References support only the named collection examples or care principles, not authentication of shop stock or claims of religious efficacy.