actually i dont know

I think "all right" is more serious. I think the "y" at the end of "all righty" makes it sound a little silly. =)

IT'S DEPEND AS YOU SEE THE CONCEPT, IF YOY WANT THE RAZON BE FIFTY -FIFTY IS YOUR PROBLEM...

the correct term is "all right". a few years ago a movie starring jim carrey was released entitled "ace ventura pet detetive"'. in the movie ace ventura always says "all righty then" and although he didnt invent the phrase, he def. made it more popular it seems. stick with "all right" unless you are with friends.

i don't think there is a difference. i've used both versions with the same effect.