They are quite similar but I would opt for the darker color which picks up the color in the tile trim.

Either vanity style would work with the tile you have, but I think the darker vanity ties in with the modern feel of the tiles you have best.

I would choose the gray one to have a tone on tone look if the grays are close enough in color. It's hard to tell from photo. Also it would contrast with dark wood flooring. Good luck!

Both look like good options, but to contrast with the dark black floor tiles I would choose the lighter which helps to connect the lighter wall tiles. The accent tiles you have will be the connection to the floor color. Best of luck!

these are the wall tiles

these are the floor tiles