Code:
m S H 109W 109
0 490 460
1000 510 480
2000 435 530 500
3000 490 455 550 520
4000 510 480 570 540
5000 540 505 580 570
6000 560 520 560 560
7000 560 495 520 520
8000 540 455
9000 520
10000
Those are the values I used for the graph, maybe someone can check it to rule out reading errors by myself.
S= Spitfire
H= Hurricane
109W = Bf 109 WEP
109 = Bf 109 no WEP