Is it worth buying the “Super Powers Companion 2nd Edition” if I have 1st Ed. and the free changes supplements?

I own the original SW: Super Powers pdf that came out some years ago, however my group and I have been playing with the PDF that Pinnacle released with the rules for power creation.

I’d like to know if the changes in the second edition are significant enough to consider buying it, since I haven’t been able to find a list of the chapters of the book to know if there’s anything special beyond the rules changes on powers, such campaign creation advice, how to make heroic NPCs and villains, etc.