Personal opinion, but to me, having used both BA and VS frequently, in all cabins BA beat them in terms of quality of serviceand comfort by a country mile - this is especially the case on the VS LGW 744 fleet - which are terrible.
I do however admit to a degress of bias being ex BA CC!
ST is just a nail for BASSA to hang their coat on, its something tangible to their members and god knows they need that. They fail totally when you look at any other aspect of their handling of this dispute.
WW has them cornered and they are desparate for a reason to distract their members attention away from this fact