This information if you read the thread was from the test pilot he tested every mark of Spitfire and every one made as the company made sure every aircraft was flight worthy before delivery..the ME109 would out climb a Spi. Performance was roughly the same on the early spits it also out gunned them as it had cannons against Browning machine guns that couldn't be produced fast enough. Also the the FW and ME had far better visibility for the pilot the Spit had no rear vision and sraight ahead was clear either side of that was distorted....another fact the famous film of fighter pilots being scrambled and then you see spits taking off is properganda.. pilots didn't run with there parachutes they were already in the cockpit with straps spread so the pilot jumped and sat in mechanics doing the straps up
Fact is the Spitfire never won the battle of Britain the Hurricane did this was at the very beginning of the war.later the Spitfire was supreme..