I don't see the reason why this shouldn't be possible. As deepsand said, you'd have to replicate the campaign. Google has no restrictions within campaigns as long as they don't overlap.
Another suggestion I would add if you want to make this geographical distinction between the two campaigns is to disable the Google's "Content Network" option for both campaigns. This way, result would more accurately be geographically distinguished.
Hope It Helps

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MBA Internet Marketing Manager -
Amazon vs Ebay