BA 1st Vs VS UC

I have the opportunity to book BA 787 first to PVG for a very small price difference to that of UC with VS.
Anyone got any recommendations on BA and if the switch would be worth it?

Also have fully flex tickets with VS, how easy is it to get a refund and timeline to normally have this processed.
Thanks

Been with BA first twice in last 12 months and is in my opinion above UC, Concorde lounge was nice and quiet, very attentive staff and a kitchen willing to cook to your needs (including my wife with intolerances)

Both times i was on a 787 and such a small cabin meant you were attended to fully through the flight, saying that I still like the quirkiness of VS although it's defiantly not what it used to be!

Honest opinion... please don't shout at me