To me, it isn't a choice between which one, it's only a choice of which I want to learn first. It would be a sin to not have both the F/A-18 and the F-14!
That said, one of the things I'm really liking about F-14, as already mentioned, is the lessened workload on the pilot. Sometimes planes in DCS can be pretty mouse-click or keyboard intensive, which at times can be awkward and distracting especially if you are trying to really get good technique down. It isn't a big deal, but as someone very much in the learning process of carrier ops and operating within a squadron, being able to concentrate on just the flying and fundamental technique while either a human or Jester handles certain aspects goes a long way towards easing the learning curve for me. I'll get to learning the F/A-18, in depth, in time, but I think that for someone like me who is very new to the proper operation of carrier jets, the F-14 was the right choice for me to do first. With the F-14, more than a RIO that helps us fight the bandits, we can literally have an experienced human instructor in the back seat. At my noob level of knowledge, I think choosing the F-14 to start with will make me a better virtual naval aviator in the long run.