Much more general. The first book is a solid overview of how Google does SRE and outlining each of the various concepts (error budgets, blameless culture, etc.

Much more general. The first book is a solid overview of how Google does SRE and outlining each of the various concepts (error budgets, blameless culture, etc..). The second is more of a practical guide on deploying SRE into an organisation, a lessons learned type of book. (I work for Google but not SRE, just enjoyed reading the books)