good question but also superfluous for me.
as you know (or maybe you don't) mostly i shoot in BW and in this post i love these B&W versions much more because of few reasons..
its always depend on what exactly you want to show and to push our attention with these images - the beauty of the crystal blue skies and their interesting forms - leave them in color and first what we will see are these clouds and blue . if your goal to show us the buildings and geometry created by your perspectives - convert them to BW (my opinion of course)
Thanks for your comments and perspectives Victor!