You'd just really have to smell London to know. I don't find it a "mature" scent, but then again, I'm far from a teenager anymore. I would think Rochas Man & Boss #6 would be quite safe, however. That being said, have you checked out Givenchy Play Intense? I find that to be a slightly more "youthful" version similar to Rochas Man. Also, you could check out Burberry Brit if you think London may be too mature for you. Best of luck!