To test this concept, next time you want to buy your girl some flowers, take them and smash them into plug-shaped masses and give them to her that way. Compare results versus giving her unsmashed roses.
I don't think I've ever tasted a rose, crushed or intact, but I would imagine the smell would be about the same. What do you mean results are different?
A buddy of mine took some roses from my Bush last summer and mixed them with hop leaves in the secondary of a pilsner... that brew convinced me to start this hobby.