I think you have answered your own question ...
Camera ZOOM FX has 40 effects, way more than FXCamera. I've been using the new update for a couple of days and would say the filmreel and color effects are amazing! Fisheye works well too.
As for all the other features, Camera ZOOM FX has been around for a long while now and it probably has more features than any other camera app, so you can't really go wrong.
Bottom line is you get what you pay for.