In Net Scoring, only the player who scores more points will add to their total. The difference in the point totals is added to the winner of the round total score. If both players have the same score, then no points are added to the total.
In the example here, Blue =6, Red=5. Blue adds +1 to their total score.
Blue =1, Red =1. No points added to total.
Blue =2 , Red =8. Red +6 to total score.