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Thanks.  I had assumed the same but then I read these blog posts that seems to contradict this: http://brianjackson.io/how-to-migrate-from-http-to-https-complete-tutorial/#step19 https://www.mariehaynes.com/switching-https-happens-disavow/

This is something that I am very familiar with. We are in almost the exact same situation. Matt Cutts at Google is pretty responsive on this subject. Here is a video where he describes in detail how Google views duplicate content : https://www.youtube.com/watch?v=mQZY7EmjbMA My professional opinion is that you should try to get as much unique content on the page as possible. I have been successful at getting my customer reviews to appear on site and in the source code of the page. I believe this has directly helped the rankings of my product pages. If everyone has the same content there is really nothing to separate its relevancy in the eyes of the engine and most times the searcher as well. If you are all on the same level where is your competition? What sets you apart from their pages. Customer reviews, in my opinion, are the holy grail of on page content. If you have no product reviews (tsk tsk) then you can implement in house reviews, like a manager's review or have someone in the company write, in their own words, some informative article between 500-600 words to help give you content that is unique. Content is king, even duplicate relevant content can be harmful in my opinion. Just because it won't cause a Panda penalty doesn't necessarily mean that the content isn't negatively effecting your SEO.

By providing Google Webmasters Tools with your international targeting information, you are helping Google decide if your website should appear and how it should appear (in local results) in a location. It only affects results for geographically related queries in which a user limits the scope of a search to a certain country.  It will not affect appearance in search results that are not geographically bounded. Hope that helps.

You can search for blogs/sites with tools like feedly.com and check Domain Authority with opensiteexplorer.org, yes it's a irritating labour intensive manual work.