Clipped - for all the claims of superior quality of Australian work I have yet to see any SIA planes falling from the skies. Same for QF.
I have flown both SIA and QF on multiple occasions, I have yet to see either of their cabins looking overly tatty, although if you take in some of the older QF aircraft (most likely as a result of 787 delays) it would be said that SIA has an edge. The only issue I have seen on a recurring basis concerns QF A380 toilets. Have never had an issue on the SIA equivalent.
Yes I've heard a lot regarding the supposed inferiority of Asian MRO methodologies, but it doesn't seem that the top end Asian airlines that sell MRO services have a problem with maintenance at all.