In terms of elements in the photo I prefer this version - it's a bit simpler and with the fence and two trees framing the men and horse off in the distance I think you end up there. I prefer the colours in this version as well.
I also agree with Wendy that the the lines in the shot tend to lead you across the photo and out of the frame rather than to your subjects - mainly the fences. It's almost a zig zagging effect up the photo however because the lines don't ever converge you end up off the frame. The foreground is quite dominant too - not necessarily a bad thing as you I end up seeing two distinct areas in the photo now. Whether that was your intent though only you'll know