"Shaadh" vs. "Munkar" Hadith

Question

In hadith science, among the branches of weak ahadith are two types classified as "shaadh" (doubtful, shady) and "munkar" (evil).

These two types both refer to a hadith that contradicts a well-known strong body of hadith, such as the 18 narrations of a sahaba praying alone with Rasulullah (salallahu alayhi wa sallam) and being instructed to pray on his right side, and one narration where the sahaba was instructed to pray on his left side (the latter being a munkar hadith).

But what exactly is the shade of difference between these two types of hadith?

Answer 1

According to Wikipedia:

Munkar: Munkar, (مُنْكَر), literally means 'denounced'. According to Ibn Hajar, if a narration which goes against another authentic hadith is reported by a weak narrator, it is known as munkar. Traditionists as late as Ahmad used to simply label any hadith of a weak reporter as munkar.[15]

Shādhdh: Shādhdh, (شاذّ), literally means 'anomalous'. According to al-Shafi'i, a shādhdh hadith is one which is reported by a trustworthy person who contradicts the narration of a person more reliable than he is. It does not include a hadith which is unique in its matn and is not narrated by someone else.[15]

The main difference is that the former is reported by a weak narrator while the latter is reported by a trustworthy person. There is also other kinds of weakness.