When we focus on classical mechanics and only take charged particles (mass/ actual electric charge) there is only one difference between the trajectories of the particle in an electrical/ gravitational field: in the electric fields particles can have positive/ negatice charge thus move towards/ away of the source (or to put it that way: in the electric field there are charges which never results in bounded solutions).
But even in classical mechanics there are differents between the different charged particles. In gravitational fields, there is only the "$1/r^2" law, but electric fields have a much more forms, depending on the source (dipols ) etc. Also electro dynamics aren't galilei invariant, which a counts for another difference.
As others already said, classical mechanics aren't a good frame to compare both fields and beyond classical mechanics they are completle different.