Logical difference between 2 8-bit ports XOR?

[Darrel Taylor]

Z= (X XOR Y)
The ports are different, but this returns all 1's.

XOR is a "Logical operator", same as (^^).

To find the "bitwise" difference, you'll need the "bitwise" operator (^).
Just like in your previous statements ...

X=X^%11111111

Y=Y^%11111111