Probably too many of these questions which don't have a real answer.

As to 777 vs. 330, most people won't see the difference.

Actually I might have said in J most people won't see the difference between a 330 and a 763 until they go to the toilet. Both having three rows, i.e. row A facing the wall separating them from G. While on the 777 it's four rows so that there are people on the other side of the aisle.