Friendship vs Relationship?

It depends on the people involved. Sometimes it is good sometimes it isn't depending on the length of time and type of friendship. I think that it is pretty safe to say however that being friend for a few months or so and getting to know each other and then dating is a good idea. You will earn points with the girl b/c she knows you want to get to know who she really is, but you don't cross that sometimes awkward "sister" "brother" line that can come into play if you have been friends for a really long time.

Yes because then you already know though person and because the relationship will last longer because you already have something to build more on to.

I don't think it is. Not because it's a bad idea, but because it seems like women categorize you as friend or as a potential boyfriend. If you're in the former category, then you only get to leave it if she becomes attracted to you first. If you try to move yourself, I think you'll find the roadway blocked. That is my opinion based on what I've read or heard - I've never tried to date a friend, so I could be wrong.

And always bear in mind that there's an exception to almost every rule, so it could be wrong most of the time, but work out for you.

As far as I know, it can certainly help. But having a relationship with a girl who has been just a friend like forever could make things a bit weird if/when you break up. Having a relationship with a chick who has been a good friend for ages is nearly like incest.