Someone I spoke with today said that until a year ago or so e-granite still had some trouble, sometimes, shipping; silgranite until a couple years ago. But now both companies -- he claimed -- are comparable.

Again, the recommendation to inspect with a flashlight before installation for cracks. Again I heard that once installed, the sinks are utterly durable. I heard claimed this was so for both brands.

Whether there's more involved in the long term that distinguishes the brands, or whether the distinction is due to a now largely-irrelevent shipping issue (due to material improvement first by Blanco, then Elkay), I can't say. But it's possible you can have both sinks with impunity.

That's one problem with judging solely from reports of problems -- there can be a cohort of products susceptible to problems, that later (or earlier) cohorts didn't exhibit. It's tricky to pick away the time-component.

A comment on the breaking, we did have considerable problems with a super single arriving with cracks. After several arrived cracked, they sent one motor freight and it was fine. No issues once installed.