Originally Posted by
kcaluwae
AA offers complimentary beer and wine only, the rest also serve free spirits.
One other thing to consider may be a potential higher mile earning on some of these airlines due to status: for example as a BA Gold/Silver (OW sapphire or emerald) you earn twice as many miles (avios in BA speak) when flying with BA or TATL JV partners IB, AA, but not with AB.