I try to make similar photos from time to time. The same trees grow a lot in the area around the city, so I have an idea of the scene. (Where is it, btw?) But I found there're a hard subject.
I think the first one "with the sky" would benefit if there would be something in the sky! Imagine the same picture with some clouds. Much more interesting.
The 2nd might gain something with softer light, maybe. Others commented on the deep shadows. Some clouds would be nice here, too, for me.
Somehow this is also a matter of taste, maybe you like the (good) gradient in the sky a lot, I'd rather prefer something with clouds.
:-)