Is it just me or does anyone else think that they look really similar?????! Like when i was watching Goong, I was like.... is that the girl from Playful Kiss??! They looked like the same person to be when I was watching these 2 kdramas....

I think a lot of actors/actresses look alike and it can sometimes be scary haha. Although I don't see the resemblance between the two, I can understand how you could confuse them especially if you're watching Goong. But I think after watching many of her dramas, Yoon Eun Hye has a uniqueness that always stands out to viewers. 
haha.... oh dear, they are never alike!
yoon eun hye the cutest underrated actress who needs to choose her dramas wisely, and jung so min is a child
Definitely not! The closest to looking like Yoon Eun Hye was Park Shin Hye for me... 

Yes they certainly do. I showed someone a picture of all three them and they thought Jung So Min and Yoon Eun Hye were the same person. Park Shin Hye looks nothing like them.