Wether type vs. type comparsions are childish nor useless. On the other side, of course the they tell only one point of the whole story.
If you read the german veterans especially Galland, the picture of Luftwaffes defeat is drawn by P-51. Only due the range and perfomance of P-51 the Luftwaffe get no break to revcover the suffered losses.
Just take a look on claims, losses and bombs dropped.
http://members.aol.com/forcountry/ww2/eak.htm
It can be seen, that P-51 had a much greater impact on air superiority.