Actually,Phil,the scoring system is not the same.Basically two things influence the number of points each player gets,once a game is reported:the victory level and the Scenario Modifier(SM).Indeed,the victory levels are the same,yet the way the SM is calculated isn't.For CMx1 the SM is based on the total number of points involved.Take a look here:
https://www.theblitz.club/scenarios/sm_info.php#CM
for more details.
For CMx2,this doesn't work,since there points of each unit isn't known,so you can determine a SM based on points.