Forget about brands for now. First, let's wade through the different forms of canned tomatoes. The labels on the cans will tell you what's in them. They're also topped with puree or juice. Stewed tomatoes are peeled, sliced, and pre-cooked.
Flavor is added by introducing sugar, onion, or celery.
The seeds are usually removed, and the tomatoes are mixed with puree. Paste is made from ground tomatoes that have the majority of their water removed. It has a very intense tomato flavor. This includes the cities of Fresno, Modesto, and San Joaquin. What's consistent in the Central Valley is climate, soil, and water.