Not so,
If you are trying to level, you should be playing tournaments because of the bonus points.
So for nine, if you max out your shots you get 90 pts.
Even if you are really bad and play two unlimited nines shooting 45 you get an extra 180 XP for each nine.
So for the same amount of time... probably less because you would not be shooting 45's... you get 45+45+180+180=450.
Lower scores = faster play and the tournament XP trumps shot XP every time.
Happy hitting