Compare Contenta vs. TYPO3
Contenta is a Drupal 8 distribution that aims to provide a headless, decoupled shell for Drupal 8.
Typo3 is an established enterprise grade CMS built on PHP. In the past years they have struggled in their renewal project, but have since moved forward with Symfony components.
CMSes vailable for comparison: BackBee, Bolt CMS, Concrete5, Contenta, Contentful, Cosmic.js, Craft CMS, Drupal 8, eZ Platform, Fork CMS, GraphCMS, Grav, Jarves, Joomla!, Kunstmaan, October CMS, Open Orchestra, Pagekit, Pimcore, PyroCMS 3, Reservoir, Spress, Sulu CMS, Symfony CMF, Symphony CMS