I am not arguing anything, just presenting options.
A P-36A is definitely better than the A6M, between 1937 and 1940.
Would a P-36A be superior to a 1938 era Spitfire Mk.I, with a Merlin II and fitted with a Watts 2-blade, fixed pitch prop? Probably not. The Spitfire was making 362mph on 966 hp
Spitfire Performance Testing, wartime flight trials and reports of Spitfire aircraft. Spitfire Mk I data.
www.spitfireperformance.com