I prefer the horizontal better. I like the composition as well ..
Maybe the saturation is a little too much.. it looks just a tad bit 'unreal'.
Especially in the horizontal one, as you can see the sun is still very high and bright. So the orange glow in the clouds is 'out of place' at this time of the day.
Nice setting though and I'm sure on the 'right' day it'll bring out stunning photos.