If you click through the original Show HN posted link at the very top of the page, there's a section on the Introducing Optery page titled "How Is Optery Different From Competitors?" with differentiators from OneRep, DeleteMe, PrivacyDuck, and PrivacyBot there.

If you already have a OneRep subscription (or any other competitor opt out / removals service), you can sign up for Optery for free, and use the Free Basic account results to keep them honest and check their work.

In our experience, we typically find 20 - 40 profiles other services have missed and left exposed.