Hooks vs Angle
The hook is the killer line or idea that gets the bite for people to start reading.
The angle is the way you've approached the topic.
That can be done in two sentences.
For example: I made $100K in sales using this Inverted Funnel Strategies.
Angle: "Inverted Funnel" while hook benefit tie to the angle
I summary, angle is all about a new perspective of an idea and hooks lure people glue to your copy.
Cheers.