I wold go to the one with the most appealing base to you. The $6,700 quarterly bonus & SSP does add some appeal to 9E. In the big scheme of things someone starting CZ or 9E tomorrow should have very similar QOL. The 9E new hire will make much much much more money over the 1st few years but they are both pretty much the same job so I would go with the one that will allow you the easiest commute chance to live in base.