Those are some nice pictures but one thing to think about is that I'm about 90% sure that in this one:
http://www.deseretnews.com/images/article/contentimagetall/832951/832951.jpg
He's throwing a slider, and in this one:
http://static-l3.blogcritics.org/10/04/17/132879/jimenez.jpg
He's throwing a 4-seam fastball. Jimenez, like most pitchers, hides the ball behind his head and gets a large degree of wrist pronation when he throws his slider, that's where all the movement comes from. In addition to that difference, the stride is typically a little shorter on breaking pitches than on fastballs. In the picture with the Indians, you really cannot see his foot placement in relation to the rest of his body due to the angle the picture is taken. There is one picture from when he was with Rockies that is more head on, but it's tough to compare one picture that is head on and one picture that is at roughly a 45 degree angle.
Now, from that angle you can tell stride length, but there doesn't appear to be a huge difference between his stride lengths. The one in Cleveland is a little shorter, but again, that's not uncommon for breaking pitches vs. fastballs.