In Austrian German, both are expressions of astonishment.
The fun aspects are: while they have nearly the same usage, the literal meanings of these expressions are the opposites of each other (in English “are you crazy” and “are you smart”) and depending on context they can adopt all kinds of subtle additional meanings.
Some of my favorites are:
“Bist du deppert”
“Bist du gscheit”
In Austrian German, both are expressions of astonishment.
The fun aspects are: while they have nearly the same usage, the literal meanings of these expressions are the opposites of each other (in English “are you crazy” and “are you smart”) and depending on context they can adopt all kinds of subtle additional meanings.
Tja