We have two sites: www.example.ccTLD www.example.TLD
example = same word, name of the company.
The reasons are historic. Initially the company only had the ccTLD, and it was just a brochure site with a few static pages. Then it was redone into a blog. They keep it up date - doing a good job. Then came along the TLD (.com), which became an online store. Now there are two separate sites.
So I want to move the blog onto the sub-domain. I'm going to put all proper domain-wide redirects for all pages.
Are there any benefits for doing this? Are there are any downsides SE-wise?