ETOPS and Scaggs
Apples and Apples. F/O Freighter earns about the same as S/O Pax (if you take S/O allowances into account).
F/O Freighter earns 40% less than F/O Pax.
Capt Freighter earns 40% less than Capt Pax.
Sorry I can't give you a straight answer on salary. There are presently 17 different conditions of service in CX, and I know mine.
Hong Kong Taxes flat rated at 16%.
Non-Converging B scale for all hirees after Feb 1 1994.
More types on pax fleet (Freighter = B74F, Pax = A330-300, A340-300, A340-600, B777-200, B777-300, B744), many more destinations with pax aircraft and access to cookie chuckers if you like that sort of thing.
I am not a freighter puke, but I see from the rosters that if you are on the freighter, North America based, you will fly to HKG, NRT, ANC, YVR, SFO, LAX, ORD, JFK and YYZ. Europe based F jocks fly to Europe, Middle East and HKG, Oz based to OZ and NZ, and so on. N American F jocks do not fly to OZ or Europe except on type training.
Quality of life? Relative, really. The reason that CX makes money is because there are no free rides here. Your days of swapping to fly nothing or barely maintain recency are over. 85 hours a month, month in, month out (~3 ULH trips a month). Each trip about 5 days, that leaves about half the month off. Hotac is good, allowances (paid in cash, non taxable) are good, company SOP's are good, facilities in HKG and out ports are good, Ops Centre is good, training is good.
The only "downside" is that CX is not as touchy-feely as you are used to, there is a lot HR in CX could learn but in general, if you rationalize your relationship with CX (with ANY employer, in fact) you will be very happy.