Enjoi, even if they fit you, they both need some work. The light blue "singlespeed" is the laziest "conversion" I've seen, and the rear derailleur on the black one is either poorly installed or needs some major adjustment (and maybe a new chain, too).

Either find another bike that doesn't need so much help, or use one of these as a learning experience in building a nicely functional bike.

If it fits your body, that is.