Two different databases with different tables ?Two different databases with different tables ... so you would have to import all your products from AliExpress and rewrite edits etc from scratch. Unless there is a migration script somewhere ... which I doubt. (Too new)
Two different databases with different tables ?
Do we talking about 1wordpress database with different custom post types
So maybe that can do the job :
https://wordpress.org/plugins/post-type-switcher/