Not Equal | Variable 0x0000 = If ( Variable 0x0000 != Variable 0x0001 )
Compares Variables x0000 & x0001.
If x0000's value is not equal to x0001's, x0000 is set to a value of 0001. If they are equal, x0000 is set to a value of 0000.
JumpForwardIfZero can then be used to make the event do different things depending on the result.
Comparison commands can only be used to compare Variables x0000 & x0001.