In general, teams with 4 & 5 * star players play other teams with 4 & 5* players, and 2* teams play 2* teams. 12-0 5* team has the same winning percentage as a 12-0 2* team, and will have accumulated a similar amount of tds on the road to that undefeated season, but not versus the same level of competition. Thus, studying winning percentages, touchdowns, etc. are meaningless. A better study would be to see how 2* teams fare vs 5* teams.