[Demo] Reference versions: do not mix sizes in a bag comparison · BAGS-10639

Synthetic demo • AI-assisted. Fictional discussion exercise with simulated dates. No real purchase, customer review, patient, expert identity or experimental result is represented.

A comparison combines two sizes and attributes every dimensional difference to a production revision. What should change?

Reply scope: address the opening, explain the supporting reasoning and state its limit. Do not add a fictional personal outcome.