That's the only pair I can compare from all of the above listed.
I flew both airlines in Economy and in Business Class and I can't say which one is better, both offered good service, good food, and good entertainment. I think that the seat pitch was a bit better on SQ.
2. tough one, pass, or not, CX
3. dont know about EK, but experienced QF, so QF here
4. AF, haven't tried NZ
6. only flew 9W, so my vote goes to 9W
7. that's a no brainer, SK
8. haven't tried both of them, pass
9. only know BMI, so they get my vote