A New Window command from the File Menu will always be a duplicate.
A simple script - either run from the File Menu or attached to a button will do as you like.
Freeze Window may be required with a go back to original layout, refresh window - not sure.
The Mac FMP works the way you wish, the WIN FMP has many gotchas when it comes to multiple windows.
Multiple windows on a Windows OS system can work pretty much like Mac as long as you don't have maximized windows.
In Mac or Windows, the basic method is to to open the new window and then, while the new window still has the focus, use go to layout to select a layout for the new window. Other script steps can hide the tool bar, resize the window etc.
And your script can use Select Window to put the focus on a specific window before manipulating either the window or the data shown in that window.