Disagree Urchin, longer nose doesnt hide the target for more time.
From the cockpit you are ubable to see the end point of the 190 nose, no matter if you are in A8/F8/A5 or D9, unless you put your head in an elevated pos. In this case, the advantage is for the D9 due its "bubble" canopy.
I'll do some convergence tests, but the fact is that I have enormous problems even shooting at 250 yards static targets if I use the center of the sight as reference. I've failed even 300 yards buffs, I see all the bullets passing below, avobe, etc, but not hitting. In fact I dont use the sight at all with D9.