According to help documentation 4.4.5.347 page 988, the @WILD-function is not case sensitive. Just checked: true.
Accordding to help documentation 4.5.26 page 1029: With the following exceptions, TCC treats upper case and lower case letters identically (=not case sensitive): The relational operator EQC (in IF, IFF, DO, etc.).The character manipulation functions @ascii, @unicode, @repeat, @replace, @similar, @strip and @wild. (=case sensitive)
Accordding to help documentation 4.5.26 page 1029: With the following exceptions, TCC treats upper case and lower case letters identically (=not case sensitive): The relational operator EQC (in IF, IFF, DO, etc.).The character manipulation functions @ascii, @unicode, @repeat, @replace, @similar, @strip and @wild. (=case sensitive)