Hey Paolo,
We understand you would like to remotely control a Mac with another Mac and weighing your options on the best way to do that. You can read more about remote management, which is apart of Remote Desktop with the following articles below:
Enable remote management for Remote Desktop
Manage computers with Remote Desktop
Apple Remote Desktop User Guide
Here is information about screen sharing as well:
Ways to share your screen, files, and more with other users on your network
Screen sharing overview
Check out the information specifically from the last article provided:
"You can use screen sharing to access your Mac while you’re away, solve a problem on someone else’s Mac, or collaborate with others on a project such as a website or presentation.
If you use iCloud, you can use Back to My Mac to share the screen of a Mac on a remote network.
For additional remote management capabilities, such as installing and configuring apps, helping remote users, and creating detailed reports, you can purchase Apple Remote Desktop from the App Store. Apple Remote Desktop is used to remotely manage Mac computers in a commercial or business environment."
We hope that information helps. Take care.
