- They both have brown eyes.
- They both have a sister.
- They are both in Y-Teen.
- They both attended SOPA.
- They are both in the sub-unit αγύρτης.
- EXY has blonde hair but Cheng Xiao has black hair.
- EXY was born in Busan, South Korea but Cheng Xiao was born in Shenzhen, China.
- EXY was born in 1995 but Cheng Xiao was born in 1998.
- Cheng Xiao was a mentor on Idol Producer but EXY was not.
- EXY has an older sister and a younger brother, but Cheng Xiao has a younger sister.
- EXY can play the tambourine and triangle but Cheng Xiao can play the Guzheng.
- EXY is in the sub-unit Sweet but Cheng Xiao is in the sub-unit Wonder.
- They are both in the group Cosmic Girls.
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