In my mind, that would make it a bit easier to credit to either programme because I don't think you would be able to credit to QR if it was an EK ticket.
Which one could do with mileage and points? What's your flying outlook for the membership year in either programme? To be honest, I'm not entirely sure of the earning rates so you would be better having a look to see what would earn in each one as partner awards and then decide.
I hope that makes a little sense but please let us know what you decide.
S