The reason I found these two extremely alike covers is that I was the biggest fan of Kate Klise's children's books when I was younger. (They're always written completely in letters and emails and newspaper articles—they're extremely cool, trust me.)
Anyway, I was looking up her first book for YA readers and found this set. They're probably the closest set I've ever seen. Not that much has been changed—it's obvious that they're the same picture. But they still have some different aspects, like how each cover's suitcase has stickers to match the story, or how In The Bag has been color-tinted.
Still, the end result is two cute covers. Which is your favorite?