Of all the things that are different about processed foods that have been mentioned in this thread, this is probably the least important, but yes, there is stil

Of all the things that are different about processed foods that have been mentioned in this thread, this is probably the least important, but yes, there is still a difference... they don't "get liquified the same", because when you eat a whole peach you chew it, and when you chew it your mouth is mixing the pulp with digestive enzymes (in your saliva) and also priming the digestive juices in your stomach to adjust for the pH of the incoming matter! This turns out to be important enough that many nutritionists for over a century have emphasized the importance of eating slowly and chewing thoroughly. You can't really do that with a smoothie. Extracting energy and nutrients from food is highly optimized by evolution for obvious reasons, even in the case of omnivores such as ourselves. Modern "ultraprocessed" food is not adaptive.