Originally Posted by
global_happy_traveller
my dad got tired of PPS after 10 years and decided to go back to CX..... then here's the next catch...he found out on HKG-TPE flights on BR Business class is 1/2 the price of CX..... and my mom found out SQ discount tickets from HKG - SIN is about S$200 RT as compared to $350-400 from SIN and similar deals on SQ to LHR from HKG........... makes you wonder eh!

This is completely irrelevant to the thread topic! Your post has nothing to do with PPS vs MPC.
Fares ex-HKG on CX will always be more expensive than others. Hence HKG=TPE will be cheaper on BR/CI than CX. But ex-TPE, CX will be cheaper than the other two. SQ is CX 's biggest competitor so that's why SQ will undercut CX's fares ex-HKG.