Hurri beats the Spit hands down, up, or sideways. I love turnfighting the LA7s in it because they figure, "1939 plane...pfsh, flying brick." Then they either can't see through the blood, can't see through the chute straps, or can't see through the dirt.

Perks=YourENY/TheirENY*PerkBonus*(A multiplier based on if you land, bail, die, ect)
That means that the HurriI would get 11.4 perks for landing 1 LA7 kill at the beginning of a war when the numbers are equal.