How to sync two devices as paranoidly as possible? While I could use Google or in my case Samsung to synchronise my tablet and phone, I'd prefer a solution that neither requires Internets access nor trusting a third party. So how can I synchronise my devices offline, including sms and other non-file things, and without using a PC?

Both devices are rooted and I wouldn't mind♤ paying♤ for a solution

♤not too much
Connect both devices to a PC and simply copy all files from the first device to the second one and vice versa. So all files are in sync on both devices.

If you like to do that automatically then look up some sync app/program that will do it for you.