Yep, I agree on that.
Like I wrote above, it´s
"Spieglein, Spieglein" in the original german text of the fairytale.
There are also too many versions which have "Mirror, mirror" in it to make it a Mandela
Effect.
There are some good examples for the Mandela effect which are like a "collective hallucination".
Star Wars has some of those, "Luke, I´m your father", the light sabre thing in the fight between
Obi Wan and Darth Vader and many more. A lot of those "collective hallucinations" / Mandela effect
can be explained. My memory of the Obi Wan / Darth Vader scene was exactly like many people
remember the scene and you could call that the Mandela Effect but imo it´s just the brain filling
up blanks which we don´t remember exactly. When you watch that scene you know what I mean