What chiefly distinguishes iḥtirās from tadhyīl?

Iṭnāb: Tadhyīl, Takmīl (Iḥtirās), and Tatmīm

• Iḥtirās is always longer
• Iḥtirās blocks a misreading; tadhyīl reinforces the earlier meaning
• Iḥtirās occurs only in hadith
• Tadhyīl cannot include a full clause