Originally Posted by G-CIVC

77H requires more crew than 77G...no?
77H is 1+2+5+6
77G is 1+4+8
35G 1+4+(I don't know)

Related to this, I just wanted to let OP know because the incoming crew would likely be flying a 77G, unlikely to have 2nd SP hence the F cabin would just be treated as an additional J section...but of course, it doesn't cost CX that much to PX another crew over.

My guess is there just aren't 340 pax to fill a 77G...and there are spares for both 777s anyway.