If you downloaded a template that's powered by Sparky Page Builder (its demo content is created with it), and if you installed this template with demo data (HotStart installation), then you don't need to install the Sparky Page Builder package because it's included in the HotStart package. For example, the Hot Quattro is the first of such templates. There will be more Joomla templates powered by Sparky Page Builder in the future.

However, if you want to use a template that's not powered by Sparky Page Builder (its demo content is NOT created with it), then you will need to install the page builder plugins package separately. That's also true for our templates based on the Sparky Framework (Joomla template framework).