- YeonSeo (Yeon/jung and Eun/seo)
- JuJung (Ju/yeon and Yeon/jung)
- 2Yeon (Yeon/jung and Ju/yeon)
- They both have brown eyes.
- They were both born in South Korea.
- They can both play guitar.
- Eunseo has light brown hair but Yeonjung has brown hair with blonde highlights.
- Eunseo was born in Incheon but Yeonjung was born in Gyeonggi-do.
- Eunseo was born in 1998 but Yeonjung was born in 1999.
- Eunseo is a sub-vocalist but Yeonjung is a main vocalist.
- Yeonjung was a member of I.O.I but Eunseo was not.
- Eunseo is a part of Y-Teen but Yeonjung isn't.
- Eunseo can play piano, drums and tambourine but Yeonjung can't.
- Eunseo is in the sub-units Joy and αγύρτης but Yeonjung is in the sub-unit Natural and φορεύς.
- They are both in the group Cosmic Girls.
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