- They both have brown eyes.
- They both have black hair.
- They are both members of Y-Teen.
- They are both in the sub-unit Wonder.
- Cheng Xiao was born in Shenzhen, China but Dayoung was born in Jeju, South Korea.
- Cheng Xiao was born in 1998 but Dayoung was born in 1999.
- Cheng Xiao was a mentor on Idol Producer but Dayoung was not.
- Cheng Xiao can play Guzheng but Dayoung can play the triangle and tambourine.
- Cheng Xiao has a younger sister but Dayoung has no siblings.
- Cheng Xiao is in the sub-unit αγύρτης but Dayoung is in the sub-unit φορεύς.
- They sang a song for the OST of a game titled Soulworker.
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