MARS vs Strapi
Strapi's strength
Strapi's Content-type Builder defines collections, single types and components. Its internationalization and Draft & Publish features are configurable per content type, making it a useful content API foundation.
Where MARS starts
MARS includes a public theme contract, route and archive ownership, SEO presentation, React Admin and domain modules in one modular installation. It is aimed at running the website as well as modeling content.
The right fit
Choose Strapi when a headless content API and a separately built frontend are the intended architecture. Consider MARS when the public site and its business operations should share a managed platform. Both require a capable implementation team.