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To find the files which are in one and not in the other:

$ diff -r folder1/ folder2/

To find the file content differences:

$ diff -r -N folder1/ folder2/

When searching the Web for setting hourly cron job, I was pleasantly introduced to a simplified syntax:

@hourly <application>

For understanding the shortcut commands, go through the complete documentation of the crontab syntax by typing man 5 crontab in your command-prompt.