Originally Posted by
terminalfive
I've flown both and confirm what Alice11 says
Most people with BA only book WT+ so they can upgrade to J, and unless you travel on a 747 the WT+ is pretty much just a very slightly better Y seat..
With AZ similar story - slightly better seat but nothing like a J seat (even old style J seat) so the "worth" is minimal..
Similar story also re: upgrades.
I routinely book P, so if I is available I can upgrade for free (4000x2 miles + 4000 bonus, vs. 12500 for the upgrade).