I would go with the white. However, you want the pattern. I am not fond of stacked, but its your choice. I agree with Mrs S. that you need some colorful accessories and a bit of personality and interest in there. It will be beautiful when you are finished.

White. Doesn’t have to be stacked though.

Don’t install a backsplash that will compete with your countertop.

I will suggest that your backsplash be lighter in color but have some patterning to it. I don't usually suggest patterning but your cabinets and other surfaces in your kitchen are pretty stark. Patterning in your backsplash should help relieve this. Good luck!

there will be pendants??? and hardware for the wall cabs ???? [or are they push open?] focus on those for your embellishing. I would take the stacked white of the three shown. A condo kitchen like this is a functional space . dont over do it. a little something w hardware and finish on pendants will take you to a perfect finish line.

Agree you need some visual interest. I would--anything but the plain white, stacked.

I actually really like the way the stacked tile looks. Clean and modern like the rest of the kitchen. Perhaps for interest without getting busy you could use it in a slightly different color... a soft grey to match the countertop veins? Or something else in the overall space around the kitchen.

IMO a nice glass tile subway style stacked to add a bit of color to that really white space .Then use that aqua color for some accents like a toaster or mixer on the counter