during a siege as I do 800-850k dmg on non-snow and around a million on snow.
Siege damage is never the same . There are always pseudorandom number added and i fugured it out long ago when testing if Grimms siege skill works with human catapults. Back then it did not and i had 2 exact same mini accounts to test on ..otherwise siege damage is way different depending on castle/wall level. Dwarf isn't exactly the best testing race as damage variety depends on timming re-charge ammo skill.
As Dablu said all those lands were changed and if recall correctly capitol lands correspond to their areas.
Without any meaningful stats to confirm we can only hope that Destination can clarify with dev team about this old question...