Originally Posted by
skipaway
Well, yes, seriously. Pretty clear: is there any preference for one or the other points of origin for lower fees and taxes and for better points and miles accrual? Yes I recognize that might be a complex question.
Also, as mentioned, there exists a thread, (to which I've contributed), giving GCM itineraries showing maximum miles various members had constructed. They were mostly 3 continent fares. Now that miles aren't the only factor if one is interested in achieving status or stockpiling miles, that thread is obsolete. Also relevant is the airline you are crediting to. For American, one would prioritize AY, QR, and JL internationally and AS for North America. That might vary for other airlines' members. Maybe the data most valuable to people planning would come from those who've completed their trips and can break down the activity.
No there is not because which is cheaper depends on your route, especially which marketing airlines you have on that route, and which airline's ticket stock you ticket on. if that's enough of an answer then you're golden, else you'll need to engage not brush off points raised by the knowledgeable strangers you've asked to help you.