There is also the time factor. The business class trip only gets me to BKK so the next day I need to fly BKK>KUL and KUL>SIN.

The coach trip is 3 flights instead of 5 and gets me into SIN a day earlier.

I agree the IFE and food is secondary. Not sure how much better sleep is on UA c-class seat with non working footrests vs. ambien induced night in SQ coach. Never flown SQ coach.

BTW, this is a honeymoon trip.