Hendrik Boom writes:

> On Sat, Aug 25, 2018 at 12:39:11PM -1000, Joel Roth wrote:
>> Is there a reason not to use `rsync -n` ?
>
> Ahhh... That's what -n is for. I missed it looking through the man page.

And if you want to see the differences, you may be interested in rdiff.
Haven't used it myself but sound (and looks) like it fits your bill.

Hope this helps,
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