Which distinction between “kadhdhāban” and “uttuhima” is sound?

Al-Ḥārith al-Aʿwar: Narrator Criticism, Variant Reports and Evidence

• The first quotes al-Shaʿbī’s severe criticism; the second reports that an accusation was made
• Both are al-Ḥārith’s self-confessions
• Both are two passive forms of the same verb
• The first praises precision and the second verifies uprightness