You forget that those RAF planes that fought in the BoB had their arses handed to them when they ran into the Zero and Ki-43 over Rangoon and Australia when the RAF/Commonwealth pilots thought their Spitfires and Hurricanes were more than a match for the Zero and Ki-43. Just like the early USAAF/USN pilots, the RAF pilots learned the hard way not to turn with the Japanese.
People also tend to to forget that at the beginning of the war, the Japanese were amongst the best trained and on average already had more combat experience than both the RAF and Luftwaffe (due to the 2nd Sino-Japanese War). For example, only a very small handful had combat experience with the Luftwaffe at the start of the BoB, while the majority of the pilots that took part in the Pearl Harbor raid, Philippines and the attacks on RAF/Dutch/French colonies already had combat experience.
ack-ack
A.A., by `43 the Spitfire VIII was available for A2A combat in Burma[& Australia],
- by using LW-style B & Z tactics - they soon got the measure of the Nippon fighters.
From 'Aircraft vs Aircraft' P. 143, experienced Kiwi pilot Alan Peart wrote:
"They were not heavily armoured & our .303s could put a lot of destructive metal into them. The cannons caused obvious & serious damage.
This was not the case with Me 109s where I have hit one with machine guns from behind only to see the bullets ricocheting off."
"Our tactics were to position ourselves above the Oscars, attack at speed using the sun, surprise if possible & power to climb away out of range.
Thus we could mount continuous attacks with relative impunity".
"The Japanese defence was to fly in circles, each fighter covering the one in front & taking snap shots at the Spitfires as they passed."
"I never did see a Japanese pilot bail out"..
"The Mk VIII had a considerable advantage over the Oscars & Zekes,
being armoured, more highly powered, faster & better armed.
The Japanese on the other hand were extremely manoeuvrable, had great endurance in the air & generally outnumbered the intercepting Spitfires."
"...the Japanese suffered severe fighter losses & lost a lot of their aggressiveness. Until then they'd appeared to roam at will over Allied territory."
So, a repeat effect really - of the impact of the high powered Merlin engine fighter's belated appearance in the MTO & over Germany too [in the 8th AF Mustangs]..