Thanks for the feedback on the advantages of SQ. It is a one day business trip in BKK so would like to book the flight that allows me to arrive as "refreshed" as possible. That is why I was interested in who might have a more comfortable seat.

In terms of the return flight, I am flying to SYD and AKL for additional meetings before returning to YVR. I have booked a J class (Thai) from BKK-SYD and Premium Economy with ANZ from AKL-YVR.

It will be interesting to compare the various products as I have never flown with these 3 Airlines.