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, fine, normal porosity, high density

Wash: CJ Daily Fix, As I Am, TJs TTT
RO: YTB
LI: Suave TC + CJ CCCC, brushed through with Denman
Styling: Smooth in LAL Wet Look gel, scrunch, and plop 10 minutes, then add a little more gel, cover with silk cap, and sleep on it
Refresh: 3:1 water/Suave mix as needed