Guys, I'm wondering...
1) If iI would make a landing page in muse in just one layout desktop and create different breakpoints there.
2) And meanwhite I will make the same page but in separated layouts (desktop \ tablet \ phone)
Will a website will be loadingfaster in 2 case?
No, the loading of your site does not have to do with the number of sites you have created based on layout.
See these articles for an understanding of things you need to do to make your web pages download faster