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We moved our site over to HTTPS this week and I was wondering if I need to create a new Moz campaign? I'm aware you can't change a website address in an existing Moz campaign, however the website listed in the current campaign contains no http//www. and seems to only be entered as example.com. Anyone have a suggestion for this?

We're an e-commerce company with two domains. One is our original company name/domain, one is a newer top-level domain. The older domain doesn't receive as much traffic but is still searched and used by long-time customers who are loyal to that brand, who we don't want to alienate. The sites are both identical in products and content, which creates a duplicate content issue. I have come across two options so far: 1. a 301 redirect from the old domain to the new one. 2. Optimize the content on the newer domain (the strongest of the two) and leave the older domain content as is. Does anyone know of a solution better than the two I listed above or have experience resolving a similar problem in the past?