Also depends on the route too. In all my personal experiences flying Y with CX over the years, the ones ex-YVR & SFO have consitently been excellent while the ones ex-LAX has been consitently awful.

As for Y products between SQ & CX, the only advantage I would give SQ over CX is the IFE. SQ has portable remote controls to play games such as Super Mario, Tetris, etc. CX on the other hand does not and you must rely on the buttons located on the edge of the armrest which can be quite annoying to use especially when you have to press the buttons with a great deal of force just to get anything going at times. Also there are more program & game selections on board SQ than CX.

Other than IFE, everything else between SQ & CX in Y is more or less a tie