Pontious, I suspect it depends on what SQ fleet type you are comparing.
I was talking about the 330 which has the same J class seat as virgin have on their 330's, same as Fiji airways on theirs too.
It is an angled lie flat bed, in that it extends flat but at an angle, so you are constantly sliding towards the bottom of the seat.
A proper lie flat bed/seat that is also level is, I reckon, a much more comfortable proposition.
I don't know what QF have in their aeroplanes these days.