by the way: all companies pay per diem on TDY.
Point is that AMF doesn't per per diem on a regola trip, in regional you'll have it anytime you'll leave your base, which is everyday.
At the end of the month is 4-500$ more that you make in a regional plus benefits like travel benefits for you and your family on the major that you work for.
Not to mention the ZED.
AMF doesn't have that.