There is a little bit of a difference. I've had a full beard for 3 or 4 years now and I've noticed little things now and again. What kind of solidified it for me was when I shaved it off for about a week a year ago. I didn't get some of the strange looks from women like "what do you think your doing walking in the same direction as me" or the fast walk with the straight ahead stares in the parking garage at work

Then again maybe I just look creepy, who knows.
My fav is when I picked up my daughter at day car once and a new lady asked me for id. I said sure and showed her my id. She said "I wasn't sure if your were her dad with the beard and all". What!!!!! You ask for my id because I have a beard, how about you check everyone you don't know. So if I didn't have a beard you would have just let me take any of the kids in the daycare?
Although one good thing I don't think I've ever been carded for alcohol with my beard even though I'm in my mid twenties and your suppose to card anyone who looks under 40 or something like that. Wait does that mean I look over 40