The phrase "point margin" refers to the difference in points between two opposing teams or competitors in a sports game or competition. Full definition
It has a 4.3 percentage point margin of error. (wamc.org)
This came first by an almost eight percentage point margin ahead of other items. (social.hays.com)
Their three point margin over us in the two games effectively was the difference, as they finished the season on 88 points, two ahead of our 86. (westhamway.net)