I normally replicate from the production storage so that the replica is independent of the backup files. Replication from backup makes sense if you have performance reasons or a similar scenario like in your question (in my opinion).
Adjusting the compression has never made euch difference to me, but I also don't have many cases were bandwidth is the problem.
By the way, I really like your explanations and think they're useful for anyone preparing for the exam.
By the way, I really like your explanations and think they're useful for anyone preparing for the exam.
Thank you for the kind words @regnor :) I’ll keep at producing more!