Follow the rules
Guys, the answer is simple. Every commercial pilot should know the answer to this question.
Lets imagine you are driving a British car with the steering wheel on the right on the French roads. Just because the British drive on the left and the car is set up to drive on the left AND it is registered in Britain, you wouldn't carry that rule to France?
Now, you MUST comply with the rules of where you are, you MUST comply with the rules of where your aircraft is registered and you MUST comply (if applicable) with the rules of the state your AOC is issued in. Any conflict in the rules, you always take the most limiting rule/law.
Now as for landing distance, factored or un-factored, what is the most limiting? Job done.