With the Order of the Dragon, does the -1 discount stack with the matching-building discount or the 'as if empty' ability?

Question

Accepted Answer

No. Empty regions and regions with non-matching buildings get -1, while a matching building keeps its -2 discount. You may also treat an occupied region as empty to take the -1 instead. The ability never lets you build where an enemy token is.

Crusaders: Thy Will Be Done

With the Order of the Dragon, does the -1 discount stack with the matching-building discount or the 'as if empty' ability?