What is the best way to synchronize stores on multisite?

Question

Drupal

There are 2 sites on multisite as 2 divisions of the same company. public IP.
For ideological reasons it is divided into two sites of services and sale of goods .
Products are duplicated. On the site of services, I closed goods from indexing.
Until the import from the accounting system to each of the sites is implemented, you need to synchronize data from the main site to the service site:
- Pictures
- Prices
- Quantity in stock
Question 1 on SEO. Will he not be punished by the PS for duplicating content, even closed from indexing?
Question 2 on Import-Export. Only Feeds comes to mind. Are there better options?

Answer 1

Question 2. What about direct database synchronization?