Hi,
There is a way to exclude certain database tables from a backup (including a migration).
In the backup pop-up, when selecting what sections to include, click the ‘…’ next to database. This will allow you to disable backup of specific tables.
In this case, you would need to exclude the ‘posts’, ‘postmeta’, ‘users’, ‘usermeta’ and any woocommerce tables.
However, please not that this means that you will not be able to migrate ANY content changes (including pages, posts and custom post types such as orders).
As such, we would not recommend the Migrator as the best option in this case (It is better suited to full migrations).
We would also strongly recommend taking a backup of the destination site before any migration takes place.
Best Wishes,
David N