Migrate website from Wordpress theme Mastery to Wordpress theme Barrel

I have a Wordpress website using the Mastery theme (from Wopethemes). I wish to change themes to use Barrel (from Dedalx). I have a development subdomain where the new Barrel theme is installed, activated and ready to go. I can supply you with login details for both sites to work on them.

Website: elementsproperty.co.uk
Posts: 32
Pages: 57

I believe it to be best to migrate the site on a 'page by page' basis rather than a one button click approach, hence the reason for posting this job.

Key Tasks

- Copy and pasting text from the old theme to the new.
- Transporting media from the old theme to the new.
- Matching the layout (unless we find a better way to lay out the sections in Barrel)
- If there are new features in Barrel that 'show the content better' or are 'cooler' then to set these up as well
- Minor design changes