قُلْ أَعُوذُ بِرَبِّ الْفَلَقِ
Say: I seek refuge in the Lord of daybreak. (113:1)
بِرَبِّ النَّاسِ مَلِكِ النَّاسِ إِلَٰهِ النَّاسِ
In the Lord, Sovereign and God of humankind. (114:1–3)
Both brief surahs express a complete objective in compact language. Within that economy, al-Falaq repeats min sharri and al-Nās repeats al-nās for distinct effects. Brevity and useful expansion need not be mutually exclusive labels applied mechanically to an entire passage.
The judgment depends on the specific wording, its purpose and a relevant rhetorical comparison, not merely the total number of verses.