Valuing Legendaries

[Maroon]

But like i said it was the throwing speed (throwing speed increases the multiplier the same as if you were charging a nord with a melee weapon thus the twigs have a bit more damage than 60p and can travel alot more longer distances.....)

Dragons Breath
throwing speed 28

Twiggs
throwing speed 35

I'm going to have to correct a few things here
The throwing speed you're refering to is the projectile's speed, which does not influence the damage outcome, only the distance and arc of the projectile. So the Breath has a higher 'rate of fire', so to speak, while the Twigs can fly further.
And although logically you are correct to say that higher projectile speed = higher damage output, this is not the case in Warband. I've noticed this through some singleplayer experiments I've done, in which I increased a crossbow's projectile speed to that of a gun, and it did not deal more damage.