There wasn't a market for Lodge copies. Pattern making was an expensive part of a foundry's start up costs. Small or under-capitalized operations would often use the pans of others as patterns or to create multiple working patterns. It's why you see Erie ghosts on early Wapaks and Wagners, for example.
Try laying one on top of the other upside down, lip-to-lip, and see if they are the exact same diameter.