Do they have different mechanics? Different swing characteristics? How is one swing better than the other?
Um....both do the same thing. They start with a hip coil. Then they pull back with their back/scap to create/keep a corner. Then they turn the barrel rearward. One uses significant momentum. The other not. The important details of their swings....the absolutes....the stretch n fire loading.....around the rear hip socket....etc....are identical.

BOTH have a deep whoosh. BOTH launch from behind a corner. Not one demo in the ebook is from behind a corner.

And....NOT ONE CLIP....has been shown of a Tewks ebook trained hitter....having a corner. In fact, the ones we have seen, do not have a corner. And get this.....HE ADMITS IT.

This project was a HUGE mistake. His analysis skills are quite lacking. His question above proves it. His reliance on the forward move to get a stretch is little leagueish. He is way too inexperienced to sell a book. His poster boy doesn't do what he teaches and can not do what he does successfullly.....with what Tewks teaches.

Ask yourself....WHY....why does Colabello have a corner? What does he do to create that corner? Why isn't that taught in the ebook?