The shot of the girls walking: I vote for the second version, sort of 'distressed urban' - is it cross-processed? I think I can see what you were doing here: the textures in the original are kind of overwhelming and take the focus off the subjects, and a straight monochrome conversion doesn't seem to help that problem much, but in the second version there's a lot more depth to the space, rather than having all that texture right up in your face. I think

The shot of the barnacles on the posts in the water looks oversharpened to me - is it my eyes?? Maybe it's that the water (the ostensible background element) actually seems sharper than the posts, the ostensible foreground. Maybe it's not that it's sharper, but it has more texture and is more attention-grabbing, so it seems like there's a kind of struggle between all these elements.