Checkpoint vs Backup Node

[sulabh choudhury]

As far as my understanding goes, I feel that Backup node is much more
efficient then the Checkpoint node, as it has the current(up-to-date) copy
of file system too.
I do not understand what would be the use case (in a production environment)
tin which someone would prefer Checkpoint node over Backup node, or I should
ask, what do people generally prefer of the two and why ?