Is there less to discover in China if you’ve been to HK, Singapore or Taiwan?

Saw a comment in a post in r/travel asking if China or Japan is better to visit and a comment said that Japan is more culturally unique and nothing new to discover in China if you’ve been to HK, Singapore or Taiwan.

What is your opinion of this?

Saw a comment in a post in r/travel asking if China or Japan is better to visit and a comment said that Japan is more culturally unique and nothing new to discover in China if you’ve been to HK, Singapore or Taiwan.

What is your opinion of this?