Hello carlese,
Not entirely, because it will reduce the size by 25% of the 100Mb ... you know each time MS is adding new stuff or changing part of the system, and this happened everytime they release a new Windows 10 version ... each time the ISO is bigger ... so I will have a look at this as usual to try to reduce even more the windows installation without breaking it, which is the purpose of the WinReducer Project
PS : with my extreme preset I have a lighter difference, 20Mb but I remove almost all components