This is our 1st 5th wheel and it was ordered with the TrailAir so can't say what the difference would have been. I would have to say after I bought a generator we were trying it out to see if it would run everything. We turned AC,TV,lights ,etc. on. The DW then put a glass of water in the Microwave and turned it on ,also. Needless to say on our next trip after setting up for the night we was going to use the Microwave and there was that glass of water, just like it was when put it in there. We just couldn't believe it held the water and didn't move.
I believe if I was going to go with a Air Hitch, I would mate it with the MorRyde Pin Box. I really have few problems with the chucking, only on certain rough roads with really close expansion joints. Good luck, decisions, decisions.
---Ken