drgondog
Major
IMO - the single niche that the P-51B/C/D filled that was out of the Spitfire XIV and say, XXI, was long range air superiority day fighter. What made the Mustang a weapon system of choice was near equal manueverability to Me 109, Spit and Fw 190 but vastly greater strategic and tactical footprint. After the war my father had some rat races with some XIV's and won some, lost some - but reckoned the wins were based on his experience and skill more than superiority of the Mustang. I also might note that he shut down air to air engagements with the 355th because two fatal accidents (high speed stall/inverted spin) occurred with low time 355th pilots against the RAF Spit XIV. He never flew one but wanted to.