This is true if Text-Argument-1 and Text-Argument-2 are different in a case-insensitive comparison.
Syntax
IFDIFI Text-Argument-1, Text-Argument-2Remarks
Both Text-Argument arguments must be specified. An error is generated if a either argument is not supplied.
In the following example:
IFDIFI <EAGLES>,<Eagles> value = 1 ENDIF
the condition would be false; the arguments are not different because they are compared using a case-insensitive algorithm.