The first one has a brighter and more fantasy-like atmosphere whilst the second has a dark and eerie atmoshpere. So while both have the same forest situation, both are very different in nature.
(That probably made no sense at all, but do you understand me? )
In my opinion, also, I would rather the before painting rather than the after painting as the after seems to have a bit too much detail that I lose myself a bit in it whereas the before painting allows me to take it all it. Sorry...
But both are really great in shading and such, so good job!
I like them both as well. the style is really different so its hard to compare them. the first one looks calm and happy and the second one looks quite sinister. the second one is more detailed though and i can tell you got better