There are handy services for sharing plain text which are great for exactly this type of thing:
Note that efficient can be defined in a broad variety of ways. Likewise, what you measure (and how) is crucial to make this comparison.
When it comes to start up times, you can also make I distinction between the time it takes to bring up the desktop and the time that the computer is ready to get to work. I made this distinction specifically because it's something that I've experienced myself before:
Generally speaking, I would say that Linux is definitely more efficient overall. However, as with most things, there are different factors to consider, like the condition of the hardware, amount of programs that run automatically on start, etc.
That said, as I mentioned on that thread I link, Zorin OS in particular is much slower to boot up than most other distributions that I've tried.