Quran variations challenge the belief of many books being sent

[Bashar]

Salamun 'alaykoum/ Hello to You, too!

One MIGHT ask the question...:

Is it actually "QUR'AN variations", or is it rather "MUS-HAF variations"?

Moreover I suppose that in the Warsh reading there is an 'additional' word (Huwa I guess), while in the other ones it's 'missing'...

Please also note that according to my knowledge, SOME Muslims (including at least MOST Shiite Muslims) are of the view that only a SINGLE "version" of the Qur'an is the ACTUAL One. According to THIS opinion, all Masahif with a DIFFERENT text contain at least ONE error.

Greetings & in sha'ALLAH I'll continue