The first one has too much crud which ties it too firmly to "somewhere in some town, there's a tree" which could be a fine picture, but doesn't go well (for me) with the dramatic abstraction of a silhouette.
The second one is much more appealing, it has the right flavor of abstraction. It suffers because the horizontal of the lower branch blends with the shoreline, which pretty much ruins it. The grasses in the foreground are excellent. Not sure about the bits of tree on the right, I would probably have framed those out, or planned to clone them out. Mainly, though, get a bit lower and throw that branch up against the sky. Let the main trunk carry the tree quickly across that far black shoreline, and place the interesting shapes against the sky where we can look at them.