Why is the ISO for 21H1 smaller than the one for 20H2?
Perhaps 21H1 contains fewer editions. My 64-bit American English version of 20H2 contains 11 editions as shown below:
Code:
Windows PowerShell
Copyright (C) Microsoft Corporation. All rights reserved.
Try the new cross-platform PowerShell https://aka.ms/pscore6
PS C:\Windows\system32> DISM /Get-WimInfo /WimFile:G:\sources\install.wim
Deployment Image Servicing and Management tool
Version: 10.0.19041.746
Details for image : G:\sources\install.wim
Index : 1
Name : Windows 10 Home
Description : Windows 10 Home
Size : 15,422,422,478 bytes
Index : 2
Name : Windows 10 Home N
Description : Windows 10 Home N
Size : 14,635,161,928 bytes
Index : 3
Name : Windows 10 Home Single Language
Description : Windows 10 Home Single Language
Size : 15,386,542,703 bytes
Index : 4
Name : Windows 10 Education
Description : Windows 10 Education
Size : 15,644,726,213 bytes
Index : 5
Name : Windows 10 Education N
Description : Windows 10 Education N
Size : 14,884,389,859 bytes
Index : 6
Name : Windows 10 Pro
Description : Windows 10 Pro
Size : 15,660,173,040 bytes
Index : 7
Name : Windows 10 Pro N
Description : Windows 10 Pro N
Size : 14,882,364,311 bytes
Index : 8
Name : Windows 10 Pro Education
Description : Windows 10 Pro Education
Size : 15,644,664,631 bytes
Index : 9
Name : Windows 10 Pro Education N
Description : Windows 10 Pro Education N
Size : 14,884,327,377 bytes
Index : 10
Name : Windows 10 Pro for Workstations
Description : Windows 10 Pro for Workstations
Size : 15,644,695,422 bytes
Index : 11
Name : Windows 10 Pro N for Workstations
Description : Windows 10 Pro N for Workstations
Size : 14,884,358,618 bytes
The operation completed successfully.
PS C:\Windows\system32>