@pbelzile If you are running FOG 1.5.9 then M$ changed the disk structure starting Win10 20H2. They marked the recovery partition as non-movable. That causes resizing the disk a bit complicated when going from larger to smaller. FOG 1.5.9.115 (i.e. dev branch) has a fix for it so if you switch to the dev branch then you might work around it.
Or removed that recovery partition because it has little value because in my opinion you can just reimage with fog faster than trying to save the OS by using windows recovery. Now there are times where based on your installed applications you need to save the OS for some reason, then boot from a usb recovery disk to try to revive the system.
Now in your case, when you capture the image. On the largest partition watch to see if partclone is in raw mode. This is a block clone method that records all blocks on the disk. In this case you will get about the same size on disk in the captured image. Depending on the target OS, it might say ntfs or ext4 then that is file based capture. That capture value should be the size of the actual data on the disk.