Qasas versus Hadith

Question

In Qur'an the words qasas and hadith are at times used in meanings that are close to each other. For example: the use of qasas as in story-narration:

We narrate to you, [O Muhammad], the best of stories (qasas) in what We have revealed to you of this Qur'an although you were, before it, among the unaware. —12:3

versus the use of hadith as in story-narration:

Has not there come to you the story (hadith) of Moses?

Following the theory that Allah would never use words randomly, has the scholars explained difference between these two words when they are used in the above sense? What is the difference exactly?

Answer 1

This might be elaborated later

قصص qasas

In Arabic usually tells or is reffered to in case of a long story (as is the case in the surah of Yussuf) or fairy tale etc.

While

حديث hadith

Means a narrartive an information shared which is in best case a rather small story.

Only the translation creates some confusion as both words are about stories of different length and (detailed) content.