Fussilat · Al-Ahqaf

Both affirm the divine word fell upon certain people as it did on earlier nations of jinn and humans, and that they are the losers. 41:25 adds context about companions who beautified their deeds.

Ghafir · Fussilat

Both counsel seeking refuge in Allah against arrogance or satanic whispers and end with 'al-Sami'' but 40:56 pairs it with 'al-Basir' while 41:36 pairs it with 'al-'Alim'.

Al-Isra · Fussilat

Verbatim: 'when We bestow favor upon man, he turns away and withdraws to the side; and when evil touches him, he is in despair'; both observe human ingratitude and despair as a recurring flaw -- 17:83 in Al-Isra, 41:51 in Fussilat.

Al-Kahf · Fussilat

Verbatim opening: 'say: I am only a man like you, to whom it has been revealed that your God is one God'; 18:110 closes Al-Kahf, 41:6 opens a passage in Fussilat -- both assert the Prophet's humanity alongside strict monotheism.

Hud · Fussilat

Nearly identical: Moses was given the Book and people disputed over it; but for a prior divine word, judgment would have been passed. Differs only in the pause mark after the first clause.