Forgive me if this is common knowledge: www.rpihockey.net keeps a table of comparative ranking values which includes PWR and is already updated: http://www.rpihockey.net/misc.rank2.shtml
Obvious caveats concerning insufficient sample blithely brushed aside, here is Cornell's rank in each, on 12/30/04:
Record: 8
CHODR: 8
KrachPWR: 12
HEAL: 12
CCHP: 13
KRACH: 13
E-ratings: 14
RPI: 14
PWR: 14
RHEAL: 18
Thanks, not common to me.