Join Date: Oct 2006
Location: London, UK
Programs: BA Gold, VS Silver, SQ Silver, IHG Plat Amb, Hilton Gold, Marriott Plat, Accor Silver, Radisson Prem
Posts: 16,871
If you're on a 77W or refurbished 772 you will have the newish Thales system. Un-refurbished 772s have the archaic Rockwell Collins system.
IFE is the same throughout the aircraft, so it doesn't really matter which class you're in. The only difference between classes is screen size and connectivity options, plus no games in World Traveller on Rockwell Collins equipped aircraft.