I am not sure why it differs. To be certain you could run your own code test.

Something like

local lcDesktop
For n=1 to 17
    o = CreateObject('wscript.shell')
    if atc('desktop',(o.SpecialFolders(n)))>0
        lcDesktop=(o.SpecialFolders(n)))
    endif
endfor
? lcDesktop

I printed that list sent to you with this method on my machine