Thanks for your question.
My position on sauce right now is simple. Mother Nature's garden fresh tomatoes (many different varieties) are better for pizza than anything in a can - including DOP San Marzanos. I cannot think of an instance where the reverse is true.
I have tried the 6-in-1 tomatoes from Escalon and found them to be pleasing but not on the same freshness level as just-ground tomatoes. A bright, fresh taste is what I strive for. Not overly sweet, but nature fresh. A fresh tasting sauce, for me, perfectly blends with the crust and mozzarella to produce a mouth watering experience which signals my brain that everything is in alignment.
The Ugly Ripe tomato is very flavorful and perhaps is the best available to me at a supermarket. I am also attempting to take a step up and grow my own San Marzano's from a packet of seeds but have yet to taste the fruit produced. It is a week or two away from being ripe enough.