- They are both Korean.
- Both are part of the sub-units NCT U and NCT 127.
- Both were SM Rookies.
- Both were born in South Korea.
- Doyoung was born in 1996 but Jaehyun was born in 1997.
- They are part of the South Korean boy group NCT .
- Both of them were MCs in Show Champion (January 21, 2015 – July 1, 2015)
- They both are happy viruses.
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