Interesting debate about K/D ratio.
You know, it's not just the equipment the pilots have, but also their training and the tactics used. It seems that less and less actual piloting skills are required to fly these automagically computer assisted, aerodynamically instable planes, and also the pilot is not required to have a "flexible neck" any more, when all information required is visible on one single display. But still, the pilot's role IS important.
You might want to familiarize yourselves with achievements of the FAF (Finnish Air Force) during Winter War 1939-1940 and the Continuation War 1941-1944 against the Russian Air Force.
Example: The FAF bought 44 Brewster 239's (On US Navy, the type was known as Brewster F2A-2) on 1940, but the planes arrived too late to have any meaning in Winter War. So, when the Continuation War begun in 1941, the plane type was already starting to get obsolete, as Russian air forces could upgrade their material on a much regular basis. On the beginning of Continuation War, FAF had 40 Brewsters on service, and during the war 19 of them were shot down in aerial combat, whereas Brewsters achieved 447 confirmed kills against Russian planes. That's about K/D = 23,5 planes shot down for one lost Brewster. Of course most of the shot down planes were bombers, but still...
By the way, Ilmari Juutilainen scored in total 92 (confirmed) kills against Russians in 437 sorties, flying Fokker D.21s, Brewsters and Messerschmitts. His plane was never hit in combat.
Oh, back to the subject. Russians generally had better planes to fly; Yakolevs, MiGs, LaGG's were all good fighters - and of course they received several Hurricanes, P-51 Mustangs, Thunderbolts and stuff from the west. From 1943 to end of war Finland had in total 159 Messerschmitts, which were practically only planes that were compatible with all Russian planes. Still the Finnish Air Force managed quite well in both wars. That was mainly due very advanced and efficient training and modern air combat tactics developed by Eka MAgnusson and Richard Lorenz...
Of course, if all pilots had the same skills and followed same tactics, the results would certainly show that better plane would have better K/D ratio. This is obviously never that simple...