Nowhere in the historical and operational record, can I find any conflict where aircraft manoeuvrability, (or even performance) has been a significant deciding factor in victory. ......
If anyone has any data to show the opposite, please contact me.
Presumably you mean recently, right? Otherwise we only have to say Zero vs Hurricane/P-40, or Spit I vs 109E, or P-51D vs Bf 109G, or Sabre vs MiG-15 in Korea.
More recent examples of kills attributable to superior manoeuvrability would include:
Every VNAF MiG-17 vs F-4/F-105 etc. kill in Vietnam
Every VNAF MiG-21 victory
Some Falklands victories
Every Iraqi Hunter kill over the IDF/AF
Every PAF kill in 1965
Some Egyptian victories in 1973
Every exercise kill by the Luftwaffe's MiG-29s.......