Backup from one toaster to another ...

Hello everyone!

I have 2 toasters ... one at home, one at church.

I regularly update the home unit, today moving to OS 7.5.3. (I haven't applied updates to the church toaster since last year.) My hope was to simply create a backup from home, restoring my church profiler to be of exact likeness.

To my surprise, the church profiler couldn't find the backup via USB stick. Do I need to separately update specific OS levels before the profiler recognizes the new backup?

Please advise! Thank you.

*Update: In answer to my own question: YES! (First: OS 7.3.2 ... then 7.5.3)