this is really just a duplicate post reworded.

Yes, a duplicate post. But in any case, neither choice offered in the OP is one I would do. White Silgranit tends to stain and be higher maintenance much more than the darker Silgranit colors. The darker Silgranit colors are easy care. Fireclay is known to craze, to be a difficult install due to irregularities in the shape, and is expensive.

My rec would be either to get a darker Silgranit color like anthracite (which I find very chic against a light counter), or for a white sink get a Kohler enameled cast iron sink.

Research fireclay sinks and cracking.