When I was a kid my mom cut my nails gently with those curved nail scissors my dad cut them with clippers somewhat forcefully, unevenly, and short so that they hurt. Needless to say I went to my mom most of the time. That was a LONG time ago but it is my only experience with scissors.
I cut mine with clippers because I dont know how to use the scissors. It feels more precise with clippers but I hink you may get a smoother edge with scissors.
I use a nail clipper but I kind of shape my nails with the clippers - I don't cut straight across. Then I file my nails to get them even. Scissors are awkward to use, IMO.
I use nail scissors mostly because I think they are easier to handle and work with, but nail clippers are good at giving that straight across, french manicure kind of look