This question has been answered in other threads if you care to look. To summarise SQ pay is related to the aircraft so 744 higher than 777. But if you are already rated on 777 then why involve yourself in a bond for an extra 1 or 2,000 $ per month. Likewise if rated on 744 it's a no brainer to join SQ Cargo - more pay and no bond. If not rated on either then you have to decide what you want to do. In my opinion the cargo job is the better option, much less hassle than flying passengers, longer patterns = more time off in Sin and also when down route. Some don't like the leisurely patterns some do. It really is up to you.