A loop is a complete 360 degree turn in the vertical. The diagram is of a vertical rolling scissors. When it's not vertical, it's a flat or horizontal rolling scissors. Below is a diagram of a flat scissors:
By your definition there's no loop in a split S. Now we can argue if you're half right or half wrong.
A flat scissors is not a horizontal rolling scissors. A flat scissors is a series of level turns nose to nose with the bandit. It's a radius fight, the flow is one circle.
The rolling scissors is a turn rate fight. It's two circle flow, it's basically a tail chase with vertical "turns",i.e. loops or partial loops, made up of barrel rolls.
A flat scissors can be horizontal or vertical. A rolling scissors in the vertical is a spiral climb because a vertical barrel roll is a spiral climb. The first diagram may intend to show a rolling scissors but where it says "scissors develops" the red ribbon should be over the blue ribbon. The drawing is in error and that's why it looks like a flat scissors in the middle.
