SJ: Photoshop skills

Sometimes finding pictures for SJ is hard.  So I've been watching some photoshop tutorials in hopes of shopping some images to get what I want.

I am by no means an expert but I would still like "professional" level images or at least can make changes where you can't tell they were shopped.

Below are two images (after break).  I made one change in one of them.  Which image did I change?  What did I change?  How long did it take you to find it?