Points per possession (PPP) is a better way of measuring efficiency. Points per minute is a meaningless statistic. If you accept that most games will have roughly an equal number of possessions for both teams (one team could have one more than the other), then if your offensive PPP is greater than the opponent's PPP, you win. The number of possessions really doesn't matter (unless you are betting the over/under), you just need to be more efficient than your opponent. You can argue your margin for error is lower with fewer possessions, but if you're playing against a good offense, giving them more possessions is also a dangerous recipe.