It is hard to match different stones, in terms of their whites and greys, but then I don't love the stone counter stone splash look. I've dubbed it Stonehenge. If you do love the look, you might do better with a Thassos marble with its clean, bright whiteness to contrast with your Super White, as opposed to Carrara, that is mostly grey, and possibly (probably) the wrong grey. My personal preference would be ceramic tile, but that's me.

I was going to say pretty much the same thing as eam44 but then found several nice pictures on Houzz that use either a carrera or statuary marble with Super White. The mosaic backsplashes are especially pretty.

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Maybe it's just me, romy. That first image is very very busy, the second is not that bad, the third is a mismatch, as is the fourth, but the quartzite and bs don't abut, so it's not that bad. The fifth image is pretty because you basically see the herringbone tile, not the stone, sixth image, eh..., seventh, again, very busy, but in truth, the color matches aren't bad, if you have the right slab. Super White can be a brownish grey. Definitely wait to have it installed before chosing a bs.

Plus look what you could have instead...

Or...crackle tile, as in romy's beautiful kitchen