- Both were SM Rookies.
- Both are part of NCT 127.
- Johnny was born in the USA whereas Haechan was born in South Korea.
- Johnny was born in 1995 but Haechan was born in 2000.
- Johnny is an Aquarius and Haechan a Gemini.
- Haechan debuted in NCT 127 before Johnny.
- They are part of the South Korean boy group NCT.
| To view the JohnChan gallery, click here.