I don't think we are seeing the former while the later is how you use the former for the production of actual food that is consumed. Converting fruits into smoothies makes them retain mostly only sugar, while vegetables (and fruits) under thermal treatment loose a lot of nutrients like fiber and vitamins.
Wait. So where does the potassium go in my banana when I blend it up?!
One concern in nutrition is separating fruit juice from fruit pulp. You probably wouldn't eat three oranges in a sitting without feeling full but you can certainly drink three oranges' juice. That's the number of fruit needed to make a cup of orange juice.
If you're adding juice to a kale smoothy it's more complicated. At a certain point of extortion, refinement, and concentration that juice can become a proxy for simply adding cane sugar.
If you're blending your fruit and eating the pulp then there is no change.