- Both are part of the sub-unit NCT 127.
- Both were SM Rookies.
- They are both Aquarius.
- Both are fluent in English.
- Both were born in February.
- Johnny was born in America whereas Jaehyun was born in South Korea.
- Jaehyun is also a member of NCT U.
- Johnny was born in 1995 and Jaehyun in 1997.
- They are part of the South Korean boy group NCT .
- They are both DJs of their radio program "NCT's Night Night!" (formerly).
- They are part of the "Foreigner Swaggers" (though Jaehyun is Korean).
| To view the JohnJae gallery, click here.