I am specifically looking for statistics that estimate man for man what Wehrmacht infantry units were worth compared to allied infantry (principally British and American) after the opening of the western front with Operation Overlord.
I have received the statistic that Wehrmacht infantry was 20-30% more effective against the western Allies and up to 2x more effective than Soviet infantry overall. The source of these statistics is unreliable though. I'm providing them here as a suggestion.
I am specifically interested in a statistical analysis of the hard numbers, not a soft analysis of why some units might or might not have been as combat effective.