Where do you find 461 economy seats on main deck, including those last 62?
What I get is:
Main deck front of 2nd doors: Emirates 76Y, Singapore 12R, Qantas 14F
Main deck from 2nd doors to back: Singapore 311Y, Qantas 332Y, Emirates 323Y
Upper deck: Singapore 60J and 88Y, Qantas 72J and 32 Economy Plus, Emirates 14F and 76J.
Etihad Business Class on A340 is 8 abreast flat beds. So this may compare with Emirates.