Take the money every time.
Believe me, after 24 years on both flight and ground ops , NOT having to raid the penny jar is a godsend.
Twenty five years ago this was a good business to be in, but now you will find the excitement will wear off really fast.
Airlines and handling agents and even maintenance firms are in a race to the bottom (my company is about to lose most of its Russian, Philipino and Malaysian engineers back to their respective countries because they can get better money at home , and these guys are SKILLED AND QUALIFIED!).
No promotion prospects, long hours and crap money is not a smart career move.
But then , you may be sparing your current employer some future headaches if you are truly considering this move - Darwin, and all that!