Points-scored can often be the result of one or two blow-up weeks, and not a real representation of true overall rankings. Our points leader in my 10-team league is actually 4th overall in terms of record. He is 1st in points because he had blow-up scores in Week 4 and Week 10. Other weeks, he was as average as they come.
If you play in a head-to-head league, and coaches plan each week to beat the team they are facing (sometimes, its better to go with a sure 10 points than a shoot-for-the moon flukey player that might get you 15), then you sgould use overall records to rank teams.
IMO