Aesthetically speaking, I like the horizontal version better, but would have appreciated the vertical had I not seen the horizontal. Your composition is well balanced, and your post processing seems to work well. I do like the bluish hues in the vertical version, but something about the foreground bothers me. Not sure, but perhaps the contrast is too high. The horizontal version doesn't leap out as much to me, and maybe that's due to the color, I just don't know. Nice images.