If you look at those prices posted I would probably take the second one.
The first was a glance at the prices down to about 8th.
Then was a look at airlines - that scrubbed a few.
Then it was flight duration.
I would then look into probably next aircraft type - A380 wins every time, then I rather a Boeing 747 followed by a 777.
Flight arrival and departure times do have an influence.
Any required stopover in Singapore would be a plus.