Free PositiveSSL is only available on Turbo and Supersonic plans. Namecheap’s Supersonic CDN is only available for Namecheap domains or 3rd Party domains using FreeDNS. The details in the comparison table were correct as for Apand the information for each competitor may not include certain features, functionalities or quantities and is subject to change. Some untrusted plugins can't be activated.
Since EasyWP plugin already handles 3 different layers of advanced caching, you don't need to install any caching plugins. On your EasyWP website you will be able to install all the plugins available for WordPress, with a couple of exceptions.