The santarpios sauce is pastene "kitchen ready", so I am assuming you are asking about that particular product. They have many others, including some packed in Italy and some packed in California. KR's are indeed california tomatoes. They are amazing, but obviously wannabe 6 in 1's. They remind me of a bad can of 6 in 1's, but are still great. I get the feeling they are not quite as "fresh pack" as the 6 in 1, and they are of a thinner viscosity. Don't forget....santarpios is cooking their sauce, so thinner can be good. I was there the other day and the crust was truly horrible, but the sauce/cheese just amazing. Im not usually a cooked sauce kind of guy, but theirs is really great. Places like this scare me, though, as I worry they are using msg in the sauce or something
Its funny how they sneak past with the crust sometimes. Stacks of bromated high gluten flour everywhere is sort of a bummer. They told me they make a bunch of batches of dough a day, and its a pretty small place mixing 100lbs of flour at a time, so you know theres no long fermentation going on.