Why? Pizza Hut was a fun experience as a Western group visiting Hong Kong some years ago; it isn't nearly what you'd think for "Pizza Hut"!
The point being: perhaps the local branding runs differently. McDonalds was mostly the same, though having real sugar and fish oil instead of corn oil was also a fascinating experience.
The Pizza in Korea is an entirely different thing altogether, much more than so than some HN people would screech their heads off at comparing Italian Pizza to the US.
The fried chicken is pretty much the same but better, because of better process. Also better chicken breed.
I've had both. They taste different in terms of flavor profile and texture and are definitely not interchangeable. Sometimes you want one and sometimes you want the other.
Saying that one is "better" in the vast category that is fried chicken is like trying to insist on the superiority of differently flavored noodle dishes.
The point being: perhaps the local branding runs differently. McDonalds was mostly the same, though having real sugar and fish oil instead of corn oil was also a fascinating experience.