TA5: straight comparisons are not case sensitive

Good day,

I am trying to compare a variable's uppercase value with the same variable's lowercase value to check if an Extracted field is numeric or not (using an IF block), but the equality comparison returns a Pass?

I can use validation on the extraction as an alternative. Still, I wanted to ask, should TA5 consider upper and lower case versions of the same value as an equality comparison: Failed?