Here’s the difference- Even when HOP was supposed to be Great Moments, it would’ve been a clone.
CoP was originally at the World’s Fair, moved to Disneyland, then moved to WDW. So CoP literally traces all the way back to the 64-65 Worlds fair.
Point is, it’s not like this is the original thing. Last I checked, that’s still standing over there at DL. And even if it was, WDW is not a museum. Many have made the argument over the years that CoP should be donated to the Walt Disney Family Museum.