The backsplash and grout color both look like they may be a little too cool for that counter unless (i) the lights are really having a dramatic effect and (ii) you are changing the lights. If the counter is really as warm as it looks, I might go with a slightly creamier tile and maybe a taupe grout. Also, I would take off the 4 inch granite backsplash when you re-tile.

I know you want lighter, but white is the wrong color, it will not look good with the counter. Pick another subway in a pale cream/gold color, and a matching grout.

White will not look right with that counter look for a cream glass subway tile.

I usually take a tile sample to the grout place and look for the closest match. You have a busy counter, and you don't need to make the backsplash busy by featuring the grout lines...

(and yes, you need a taupe or cream.)

I would agree with the rest - White is too hard again the counter you have now... the biscuit would be much better but make the grout close in color to neutralize the backdrop - you already have the lines from the beadboard in the cabinets and the pattern in the top - something needs to be simple... As for the bathroom vanity - the white sinks are ok in that top - partly because they are horizontal and then tied in with a hand towel, moldings and other fixtures in the space - the vertical color is much warmer while still being white...

Good luck!

Thats beautiful and it is a crackle tile! I love the crackle tile... it's like a little surprise that sneaks up on you...