I am really getting a hard time finding reliable informations on what are the differences between LTSC and LTSB versions of Windowns 10.

I'm using these w10 versions for work. I install them on really low end hardware (N5000/4gb ram/ssd) and I must say they work pretty great.

I just got the lastest iso from MSDN and here are the infos:

Complete name : Windows 10 Entreprise LTSB 2in1 fr-FR x64 (14 Mai 2020).iso Format : ISO 9660 File size : 3.45 GiB

Complete name : Windows 10 Entreprise LTSC 2019 2in1 fr-FR x64 (14 Mai 2020).iso Format : ISO 9660 File size : 4.19 GiB

Here's what I know: LTSB support won't be as long as LTSC's.

Now, we do have 0,74 GiB of difference there and I can't find why (in detail).

Any idea?