The familiar or majority account focuses on an actual change from one previously used mode of expression to another while referring to the same connected subject matter.
Al-Sakkākī’s treatment is broader: it can include selecting one perspective in place of another expected from the apparent context, even without an explicitly preceding expression of that same content in the other person. He consequently includes some cases excluded under the narrower account.
The question is whether an actual shift between successive expressions must already be visible, or whether departure from the contextually expected perspective suffices. Mixing the two definitions obscures the reason for disagreement about examples.