Windows 10: Why is the ISO size different for Tech bench and MCT?

I downloaded Windows 10 64bit International English from techbench and the size is 4.09GB
In both cases I selected Windows 10(not home or pro or single language or n or kn just Windows 10)
Language:British English(english international)
64bit
I created same iso using MCT and size is 3.38 GB.
Why is there such a size difference?
I compared the two iso using Winmerge and these difference showed up::








Left: iso from techbench
Right: iso from MCT

The difference: 1) In sources folder techbench has Install.wim which is 3.59 GB while MCT has Install.ESD which is 2.87 GB

2)In sources folder techbench Boot.wim is 274,678 KB while MCT Boot.wim is 274,627 KB
3)In sources folder techbench iso has no ws.dat file while MCT has ws.dat file.
4)In root folder techbench iso has no MediaMeta.xml file while MCT iso contains it.

Download location for Techbench iso:https://www.microsoft.com/en-us/soft...load/techbench
Download location for MCT: https://www.microsoft.com/en-us/soft...load/windows10

:)

 

[RESOLVED] DISM "error 0x800f081f The source files could not be found" even with correct ISO and path

I understand why SFC works post DISM.

But that's not a logical answer for why DISM worked with the Tech Bench ISO. Your response doesn't justify why DISM worked with the Tech Bench ISO and why it didn't with all other previous Windows 10 ISOs, even though DISM still shows the version number
as being 10.0.10586.0 and I'm running build 10586.104.

Nothing had changed on my system between using the previous ISO and the Tech Bench ISO (it hadn't even been restarted until AFTER running DISM using the Tech Bench ISO).

 

Tech Bench ISO

This link worked on my Windows Phone! Thank you all!!!

 

Install.esd is a more compressed version than install.wim.

There is no difference although one may have more recent updates than the other included. Makes no difference as install updates quickly to latest version.

 

Hi AVG, welcome to Tenforums. Since you are obviously inquisitive, you may wish to look inside the .wim and .esd files to see why they vary. You can do this with the latest version of 7-Zip:

7-Zip

You can even use the 2-panel view to compare the two side by side.