Moderator, Iberia Airlines, Airport Lounges, and Ambassador, British Airways Executive Club
Join Date: Feb 2010
Programs: BA Lifetime Gold; Flying Blue Life Platinum; LH Sen.; Hilton Diamond; Kemal Kebabs Prized Customer
Posts: 63,844
It's always good to be specific since it saves some of us going off on a tangent. This looks like a single fare, in which case BA will default into an expensive flexible ticket, QR does not, since on this routes (and many others) QR will sell single fares at inflexible prices. This is just differences in airline policies. That, I suspect, is the core issue here. If it is a return then other factors will apply.
Using BA numbers tends to guarantee the best Avios earn, but it makes no difference to TP rates. Well, here it does since the BA rate will be in the higher TP earner to QR, but that's due to the flexible / non flexible issue.