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I would suppose a large AC moving in a straight and level line at a constant airspeed is easier to hit and bring down than a small fighter doing evasive maneuvers.
The LW lost something like 1900 aircrat in the battle, the RAF something less than 1000. This clearly demonstrates that when all the factors are taken into consideration (eg LW on the attack, faulty strategy, vulnerability of the bombers etc) the RAF was clearly outshooting the LW.
On Aug. 13 the Germans had 3437 combat a/c while on Sept 7 the German a/c strength had been reduced to 2804 a/c.
Apparently you are looking at figures on Luftwaffe strenght deployed against Britain, which is something quite different from total Luftwaffe strenght...!
ie. German bomber strenght (for the whole LW, not just the ones in France deployed against the British) was 1,380 on 29 June 1940, 1,420 bombers on 28 September, 1,423 level bombers on 2 November and 1,393 bombers on 30 November 1940.