I know both the axle-to-axle length and brace height affect a bows forgiveness but which affects it more? And to what degree??

I ask this because of all the tribute vs. allegiance threads. Ive shot both and went with the tribute because of the longer brace height, 7.5 compared to 7. I believe the allegiance has a 33" axle compared to the tributes 31". Which would be more forgiving?

Is there a magical ratio of forgivess? Such as 2" axle length= 1" of brace height?