Many factors will determine the difference.
the characteristics of a noob:
- relies too much on vehicles to kill people.
- forgets about his grenades
- uses fuel rod or rocket launchers
- does not have a very long survival time
The characteristics of a pro:
- makes the most of his grenades.
- very accurate with a sniper rifle.
- can defeat vehicles with average guns
- has long survival time
- knows how to lock banashees
pros also think shees ruin the game.