I've got an affiliate e-commerce site with a .co.uk domain. I then wanted to expand into the US market, so purchased a slightly different .com domain as well (my preferred choice wasn't available).
The content on the .com domain is the same as the .co.uk one where the only differences are the items listed for sale, their respective prices and the shops you can buy them from (as it targets US traffic instead of the UK). So there is only 1 web hosting account.
The .co.uk and .com domain are set to target different countries via google webmaster tools.
My question is, d'you think this set-up harming my Google search engine ranking for both sites?