For economy flying, AA is probably easiest. Although with some Instant Upgrade AA fares (as said above), QF Platinum can be had for $1k-$2k.
Originally Posted by
seaskybound
Would appreciate some details.
What is your normal flying pattern? Regular routes, class, etc.
AA is better for long haul economy fliers, BA/QF may be better if flying in higher classes.
BA and QF use zones with fixed Tier Points/Status Credits. The tables are different and the levels are different. Regular Premium Economy flying is better on BA, mid range flights better on QF.
But then a lot of perks on OneWorld are for the specific carrier. AA has System Wide Upgrades, so flying on AA mostly you would be better off going for AA Emerald.