i would like reasons people?

Tiffany has a really strong voice while sunnys is cute and high

Here is my thing. BOTH of them don't have the most stable voices in the singing group. I have heard their covers of songs and lots of live performances. They both fail to impress me in the singing group.

Tiffnay- Great strong voice and a lot of "soul" in it but she gets so into it she lose breath
Sunny-Great voice but get shaky when she can go a little too cute and is shaky cause of lack of breathing

husky while sunny juz got into the group because of her family ties with lee soo man

^ proof it. I have had this conversation with many people, can you tell me why you think that.