Welcome to the Q&A Forum

Hope you can help me with a query on 'Keyword Explorer' Currently, I'm able to use only one URL per search. 
Is there a way to search keywords for multiple URLs?

We have two websites (different businesses) in the technology sector that sell the same products on the same platform (OSC) but have different branding. We have tried to make the static content different and the user generated content is different. SEO as largely different. But the one site has much better rankings than the other.

Whilst the under performing site is not responsive yet, I need to decide whether to merge the two businesses into one or continue on the two separate websites approach. I would only pursue the latter approach and invest further time and effort into this under performing website if I knew I was "on the right" track.

My SEO knowledge is not extensive and so I would be interested in any views the community has?

I note that kogan.com.au and dicksmith.com.au have a similar dual website approach (same company) and they are both major brands in Australia.

I thank you in advance for any thoughts you may have.