- They both have brown eyes.
- They are both members of Y-Teen.
- They both have a younger sibling.
- They are both in the sub-unit αγύρτης.
- Soobin has dark brown hair but Cheng Xiao has black hair.
- Soobin was born in Seoul, South Korea but Cheng Xiao was born in Shenzhen, China.
- Soobin can play piano, flute, violin and guitar but Cheng Xiao can play guzheng.
- Cheng Xiao was a mentor on Idol Producer but Soobin was not.
- Soobin 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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