Trying to understand EE

UPDATE: playing with EE - way better than ISPConfig for now! great stuff.
I'll put some money in for sure

Hi

1. I'd be glad to understand if EE can basically replace webserver management tools like cPanel and ISPConfig (which I currently using or trying to use)? domain management, emails and stuff?
2. Do I need to use the EE installer or I can deploy my WP sites myself?
3. I can just deploy and configure it to handle many WP sites?
4. Does it use some strange configurations or will I be able to install other sites as well

Much thanks - really could figure it out