It would seem that those in favor of CX based their decision on $$$ mainly....
Looking at the two pay scales, CX does pay better. However, if you take a base in Canada (with CX) the difference isn't that much it would seem. Also, if you take into consideration the quick command upgrade time that one can anticipate with AC if hired at this time (800 retirements at AC...), you could actually be ahead with AC (compared to CX on a Canadian base) in 5-10 years time.
But maybe I'm missing something....