Newbie is a new player. Most of the time willing to learn.
However, noob has absolutly no meaning.
If you win, you're a noob.
If you lose, you're a noob.
If you cry, you're a noob.
If you don't care, you're a noob.
If you lag, you're a noob.
If you hack, you're a noob.
If you're legit, you're a noob.
If you're a higher leverl, you're a noob.
If you're a lower level, you're a noob.
If you like pancakes, you're a noob.
People will call you a noob if their ego is high, NO MATTER WHAT.