You are right, simply because there were more Hawkers produced. But talk to anyone who flew then. I have a very close friend who flew both, and also flew the P-51 Mustang. His name: Art Jewett of New Brunswick.
His opinion was quite simple, nothing could out turn a Spitfire,and until the Mustang came along, nothing could outclimb it ( Spit Mark V)
He also considered the Mustang to be uncomfortable because the pilot's seat was reclined at an angle that made it difficult to check the 6 o'clock area by turning one's head. The early P-51 versions would also suffer G-Lock in their ammo feed guides , which caused some early deaths for P-51 pilots.
These Spitfire aircraft had V12 Rolls Royce Merlin engines. The supercharged version put the Germans behind in tech. innovation.
There is no sound like it, as you will hear at the web page reference in post #18 above.
P-51's had the range. :)