How to explain to the client the difference between SSR and the usual classic html + php site?

Question

Web development

I myself perfectly understand the difference between SSR applications and ordinary sites where the server generates an html page using php and a template engine. But how to explain this difference?

The first situation: The usual html layout and some cms or php framework on the backend.

Second situation: There is a backend. There is a frontend written using vuejs or react based on the same layout + nuxt or next for SSR and the backend is already exchanged via api.

As a result, in that case, generation on the server side and in another case. But how to explain the difference and why the second option is more expensive?

Personally, it seemed to me that the second option works faster.

Answer 1

ssr gives the generated static from the start.
Beck, for a long time, can do the same.
in the end: the question is in the specific implementation and the ability to sell.

Answer 2

Everything is mixed up in the Oblomovs' house)))
Doing via API is not necessarily more expensive, and it does not always work faster, but it is more universal and extensible.