What is the difference between The League: Nemesis Rising and The League: Nemesis Legacy?

This is where I have a fun urge to be flippant and say: Really neat logos! Okay, but seriously . . . Nemesis Rising are the books that tell the story of how and why the Sentella is formed and their war against the League. It’s about the men and women who make up The Sentella and who fight for the rights of others and who are hellbent on making the Ichidian Universe safe for all.

Nemesis Legacy are the books that take place after the war with The League ends (decades later), and what happens to the children of the Sentella and how they struggle in the shadow of their legendary parents as they try to make their own contributions to the universe and continue the noble work their parents started.