Order a full-size door from the cabinet manufacturer. This is huge decision that costs too much to blow. I have to say the concrete color doesn't appear to be in the same ballpark. Whose cabinets?

I agree. We have a,ways brought a sample door with us when picking a counter.

this is for the sink, right?

I would choose the lighter one, UNLESS it is actually warmer toned, like in the photo (even if not as much as in the photo). Your stone looks totally cool-toned gray.