A claim of abrogation cannot rest on the bare fact that two texts sound different. One may be general and another specific, one unrestricted and another qualified, or they may govern different circumstances. Even known chronology does not establish naskh where the domains differ.
Actual abrogation requires the later legal proof to terminate the former ruling's applicability in the relevant case. Distinguish abrogation from specification: specification excludes some instances from a general statement, whereas abrogation ends the applicability of an earlier operative rule.
An abrogated report does not become historically false. It accurately transmits a ruling that operated earlier, though that ruling no longer governs the case.