Basic is for the frontend part of your website (PageBuilder + hosting) for 1 year
BESTARTER is CloudBackend Starter plan for 1 year, it's used for Database / API / Transactional emails.
you can adjust paddings / margins and Responsive font size for each screen size without affecting other screen sizes:
Another thing you can do is create a copy of a section that will be visible only on mobile, and hide the general one on mobile: https://support.appdrag.com/doc/Show-and-Hide-elements-for-some-devices
This will let you set different content for mobile & desktop