380 is replacing 77WN (777-300ER with new F fit out) as of June 18 on 227 / 228. 77WN was on 227 / 228 since March - whether it returns to 227 / 228 post the 380 stint only time will tell - it may be shared around to other destinations.
YES std F on 777, 77W and 77WN all have 8 seats in F cabin and all the same seat layout diagram so impossible to differentiate by looking at seat map TBMK.
But those 77Ws that have Y+ installed will drop to 4 F seats yeah?