Can someone explain these circle hook differences?

The Best Sea Fishing Hooks

NJDEP, Fish & Wildlife

Tune-Up Tuesday: J Hook or a Circle Hook - Tips and Techniques

Hook size - J hooks/ Circle Hooks

Legal vs. Illegal Circle Hooks (Do you know the difference)?

Introduction of the Circle Hook in BC - Fisherman's Market

Fishing Hooks 101: Parts, Sizes, Types, and More

Fishing Hook Sizes - How to Choose the Right Fishing Hook

Mike Ladle's Fishing Diary

Circle hooks required for recreational shark fishing starting June 22 - The Coastland Times