America's Test Kitchen did an extensive taste test on various "San Marzano" cans of tomatoes, and compared with top-rated supermarket brands.
The bottom line; don't waste your money on the SM's.
I heartily agree.
Check to see that the tomatoes are packed in tomato juice vs. puree, which is a cooked product (I believe DOP SM's from Italy are packed in puree-it's a tax thing).
Look for the additional of calcium chloride, which preserved firmness.
Tremendously overrated. Tremendously overpriced. I bought them once, and the sauce I made was just "eh!"
I like Red Gold best.