wp-cache vs. wp-supercache .. what’s the difference?

Did you try reading WP Super Cache’s homepage? It has a list right there…

https://ocaoimh.ie/wp-super-cache/

The biggest difference, is that Super Cache creates html files that can be served directly without PHP loading.

For the developer, there are extra hooks to make the caching process more flexible and configurable.

Lots of other changes too, go look at the page linked above ??

so whats the best, should i use the wp-cache or supercashe? witch on does use less “server resources”?

Super-cache is the best. It contains everything the old wp-cache does plus the option of super caching.

It’s also actively maintained. WP-cache is old, dead code.