I agree, at least in the old days it was a safe bet that on AC, a North American 767 had J amenities roughly equal to an A320 or A319, and on CP, 767s were better but the A320 and A319 were consistent, and 737 was slightly inferior (and usually used on shorter routes, but not always, e.g. YOW-YVR).

Now you can't even count on a domestic 767 being as good as an A320!

andrew