I think he's probably not right!
Copy Different is a *superset* of Copy Newer (and is, in fact, what "Smart Update" uses -- it's more "Copy Different with Delete").
You can't really have an "OS And Applications Only" copy, because you need at least *some* user files. But you could use a Safety Clone, depending: what are you going to use this for?
(Copy Scripts aren't really scripts at all, and are quite easy. Look at the ones we provide as examples. For example, look at "Backup - user files". Not too hard!)