I prefer the gray because it looks too sterile to have too close a match to the white cabinets (and it'll look weird if the whites don't match). If you want both cabinets and backsplash to be white, you need at least have the textures be different. It would be helpful to show countertop selection.

wait until cabinets and countertop are installed. then choose. all depends on your lighting as to which shade will look better.

your pictures aren't that great either. the gray tile looks like a warm gray, while your quartz sample looks on the cooler side.

obviously the white will work with that quartz. then you'll have a kitchen that looks exactly like the other 10 million you see online.

Beth, right?! I guess I’m with the 10 million other people, because I think it looks good!

it does look good! You shouldn't have any problem visualizing what you want or need.

did your cabs/countertops get installed yet?