Semi seriously, you should perhaps also try to factor in the effects that modern ac bring, eg the use of PGM increases the likelihood of target elimination with fewer sorties as opposed to the area bombing tactics of UK or US WWII campaigns.
Taken to the extreme there was no WWII bomber able to carry the offensive load of a B52.
Similarly modern air superiority ac have an immensely greater SSKP than their WWII counterparts through automation and the use of AAM.