I honestly can't feel that much difference in handling between the B and D when both only have 4 guns. I don't like the rear view from the B, nor the smaller external bombs, nor the lousy 'high-drag' rocket tubes, nor the poor acceleration (which is much worse than the D). In the 15-17K range though the B is faster and climbs a bit better, I never typically venture that high and the D is superior anywhere below those alts. Not saying the B is bad though, it is still a very dangerous aircraft, but it doens't tend to quite have the flexibilty of the D model.