Thank you for some concrete information. Those samples could actually be different batches of the one colour. The flecks and shading are almost identical. Is the new version the low silica option following legislative changes? If so, you’ve been caught up in a change that was beyond the Manufacturers and your control. It would also explain the same name being used, something typically not done because it causes problems. PS you assumed I’m a guy. I’m not but I do have 25+ years of dealing with contracts, vendors and projects. Half my life is spent trying to get suppliers to do things they may not want to do, and it all comes back to the paperwork particularly the disclaimers and exclusions. I can’t see any resolution for you.

Got my answer - non combustible material such as, natural stone - marble, granite or concrete etc.

I hate to say this, but I really think it depends on what you like and there are pros and cons to each. First, gloss will show marks, such as fingerprints or smudges easier, so that is something to think about, depending on who uses your benchtop and how it is used. I have had clients use both, but personally, the gloss makes me a little crazy keeping up with the smudges, but that is more of an issue to me, in a darker colour. Gloss also gives a bit more of a luxe feeling and reflects more light, which can be a good or a bad thing, depending what you are after, and the amount of light your kitchen gets. I am assuming you have gotten a sample of both to look at in your kitchen and play with a bit. If not, definitely do that and see what you find. Let me know if I can help more.

Thanks dreamer...yes I have made a mistake in my title!  Meant to be engineered stone vs natural stone. And thanks for all comments. Was hoping someone who actually had experience with natural stone in these areas and had a negative experience would comment.