Difference between “Salsa di pomodoro”, “Passata di pomodoro”, “Conserva di pomodoro”, “Polpa di pomodoro”, “Pomarola”, and “Sugo di pomodoro” — Disclaimer: These are my interpretations/thoughts along with a little research, so It can be considered wrong, and there can be differences for every region in italy or difference with translations.
I will talk only about the final product, not the method, becaude it can change.