Issue Migration vs Backup-Restore on Plesk Onyx (WordPress, Linux)

[prayudi]

Good day.

I am currently running a Plesk WordPress edition on a Linux server.
We need to perform migration to a new server and found this article:

Transferring Data Between Plesk Servers

We have gone through the documentation and found out that it's not possible for us to run migration due to several restrictions (firewalls, SSH access) in our environment, so we are going to go with backup-restore.

The questions are:
1. Is there any difference of results between Migration and Backup-Restore?
2. What are the weakness of using Backup-Restore method?

We are asking these questions since in the documentation (linked above), it is stated that Migration is recommended.

Thank you!

 

[mpetsos]

Do we have any answer about this?
1. Is there any difference of results between Migration by Plesk Migrator and Backup-Restore?
2. What are the weakness of using Backup-Restore method?
3. Can i use both ways for second or more times to update the destination server? Is the data being overlapped each time or can duplicates be created?

Thank you.