I'm better than you
Statement indicating that one person is superior by undisclosed means to another. Often used to stop moments of awkward silence.
I play baseball; I'm better than you.
Because I'm better than you
What you say when your friend asks why you didn't go to his/her party/event.
Friend: Why didn't you come to the party last night?
Other Friend: Because I'm better than you.
Other Friend: Because I'm better than you.