These were taken just moments apart, with (essentially) the exact same camera settings.
The only difference between the two shots was shutter speed, in this shot the shutter speed was 1/60s. The blue sky is brighter and where the sky meets the land it is pretty bright (and void of color).
I wasn't unhappy with the shot but thought it could be better so I changed the shutter speed to 1/160s and (I think) it greatly improved the shot, the sky is a deeper blue and there is now more color on the horizon.
The differences aren't "dramatic", just better.
For a better comparison click on either image to view larger and in a new window.
It is often said that if you think you got the shot take a step closer and shoot it again. I would add "shoot it a little different" as well.
