i use canned peaches, pears and pinneapple in some of my sauces. I usually cook the fruit with the sauce. Would there be a difference in flavor if I was to cook the sauce then blend the fruit at the end instead of cooking it. Guess I'm wondering if the fruit flavors would have a more fresh and apparent flavor in the sauce.
If you are 1) cooking the fruit a fair amount of time and/or 2) using not-too-little amount of fruit compared to sauce, there will , almost definitely, be difference in flavor, and yes, it should have more "fresh" notes, and it will also miss some of the cooked-fruit notes. If you are after fresh notes, may I suggest using frozen, or even fresh fruits?