Maqṭūʿ concerns the endpoint of attribution: the statement is attributed to a Successor or, in related usage, to someone later. Munqaṭiʿ concerns chain continuity: an intermediary is missing or the connection is not established. Despite their similar root, the terms answer different questions.
Example 1: A statement of al-Ḥasan al-Baṣrī carried by a fully connected and reliable chain may still be maqṭūʿ, because its content stops with a Successor.
Example 2: A report ascribed to the Prophet ﷺ may claim a marfūʿ attribution while a link in its isnād is missing.
Accordingly, the word “maqṭūʿ” does not automatically entail a weak chain, and the word “marfūʿ” does not guarantee a connected one.