Little point of contention the US flies the F/A-18A/B/C/D/E/F not the F-18. Finland and Switzerland fly the F-18C/D which lack the avionics to make it a proper ground attack aircraft, although the Swiss did later on retrofit their birds, but kept the designation.
Well on those stats I know at LEAST 2 F-18B's that the Marines own. I've flown one of them and some things are archaic coming from T-45C's. I mean c'mmon scrolling gauges?!?!? I keed I keed.
Also, I can't recall too many people referring to the hornet as "F/A" anything. Brevity dictates "F-18" from the little experience I have.