The title is Planet Earth...the only guidelines are the size and the fact that it has to have something to do with the earth, be it nature, man-made things, or otherwise. It's not about what fits the criteria best but more about what people like the most, which is why I posted it here.
I like the first one best, because it makes my eyes wander and really 'dig in' to different things... the second is excellent, but it makes the eyes zero in right on the middle... I like wandering... wandering is good.
I just finished an art class where the teacher showed us pieces in the adjacent gallery... she commented on one scenic that you want people to see all of it, and if the details make you look in every area of the image, you've done good... (not her exact words, but you get the idea).