Make a Full backup and new increments should be smaller, since after job configuration changes, increments of the same chain can have different sizes.
As to the fact that same VMs have different incremental sizes, it means that one vm`s data blocks change more often. Despite above-mentioned reasons can be just a greater activity.
centneroff wrote:The size of full backup is 1,49 TB, backup method is incremental
Is it the same for both VMs?