Hello,
Watch video tutorial on how to edit header
https://www.youtube.com/playlist?list=PLMqMSqDgPNmDu3kYqh-SAsfUqutW3ohlG
The main difference between your screenshots is the font-family. Go to Theme Options > Typography > Content > Choose the mulish font instead Muli. After that go to Theme Options > Header builder > edit the menu element and also choose the Mulish font.
Regards