Welcome to the Q&A Forum

Hi there, They are both competing for the same search terms. Probably, one will never out rank the other and you have double work to do. Also, the duplicate content might be hurting both sites. My advise is to create a second directory in the older and global site. Then, use hreflang telling google the country specifics. Then you can use some of the leverage the older domain has.  I'd do: sample.com (global) and sample.com/uk/ (for UK). Here some  resources: International SEO - Moz.com FAQ: Internationalisation - Google WMT central The International SEO Checklist - Moz Blog. Best Luck. GR.