What iPhone 5S case is better? Matte or Glossy?

So I'm deciding to make a custom iPhone case with a collage of pictures of my favorite celebrities in it. I was just wondering what a better iPhone 5S case would be better if I ever get them to sign it. Is a MATTE or GLOSSY one better? I honestly don't know how the the feel/texture of the cases are so. If I went to a concert and I got a chance for the singer to sign it, which one is better to not get the signature off or not smudge that much? Sorry if this is confusing.

ALL IN ALL: WHAT IS THE BEST CASE TO GET FOR CELEBRITY SIGNATURES TO NOT GET SMUDGED OR SCRATCHED OFF or at least stay on for a long time.

Get the leather one from the Apple Store: http://store.apple.com/...case-brown

Matte