Hi,
Gtmetrix seo analysis website helps to find performance,speed and other important parameters to know difference between HTML static website and prestashop dynamic store.
HTML static website loads faster as campare to dynamic website, Once performance score of dynamic website improve then it helps in better ranking.
If possible share the urls of static html and dynamic prestashop store urls.
PrestaShop Tutorials Videos [How to do Tasks]
https://www.prestashop.com/forums/topic/907438-prestashop-tutorials-videos-how-to-do-tasks/