كَمَا أَنَّ الْقُرْآنَ كَلَامٌ وَاحِدٌ، لَا يُتَصَوَّرُ فِيهِ تَفْضِيلٌ
Likewise, the Qur'an is one speech, so superiority among its parts cannot be conceived in that respect.
When considered in relation to the divine attribute of speech, one part is not more perfect as a part of that attribute. When verses and surahs are considered in terms of recitation, writing and teaching, however, a difference of merit may be discussed.
Whether a statement holds therefore depends on its respect of comparison. One must not introduce gradations into precisely the respect in which speech is held to be one.