Sort order on default Records view - Records with same name, what is the second field use

Does any controls exists on the display order of records having the same names ? We have several environements and they are "equal" in terms of versions / migration. We have 2 distinct record objects sharing the same "record name" and having a different description (security purpose), in each of the environments they are "equals" but still, in one of them the display order of Records are not the same... What decides on the sort order? (see attached image)

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