Fred and George, they are identical <3 (Although, I hope the top row isn't meant to be all George as some of them are clearly Fred and the same for the bottom row! But hey maybe that wasn't what the creator of this was aiming for...;)
Oh my god!! Harry was just a little innocent little boy, now he is so serious. Hermione WAS a know-it-all. Ron was just... so cute!! Neville IS soo hot! Draco's hair was so, haha, blonde. And Ginny, WOW is soo...differently different!!