I have a hard time telling the difference, too, but to me, S curves are waves (2), and spirals are curls (3). But the longer you're on CG or modified CG, the more you may see your pattern changing.
3a/b, F, normal porosity

I've gotten my routine down to the bare essentials, finally
Wash: Suave Tropical Coconut
Leave-in: Suave Everlasting Sunshine, detangle with Denman brush
Gel: LAL Sport or Wet Look
Scrunch with flour sack towel, plop 10 minutes, air dry
Refresh with either plain water or Suave/water mix