Do あなた think シダ Laleine Bozar (Tiffany Hwang cosplayer from Philippines) looks like Tiffany?

I suppose not.

I think she does look like Tiffany, sometimes.
Maybe there are a couple distinguishable traits of their face, and probably body, but I can say she looks もっと見る like Tiffany than others.
Nonetheless, as a girl, I can say she's a beautiful young woman whether あなた compare her to Tiffany または not.

–––But that Yoona duplicate was literally, a DUPLICATE!

Eeew NO. The YoonA one looked もっと見る like YoonA but this one doesn't at all!