With DP 9.04, disabling CBT is no longer an option; you have to use it.
When I ran my first VMware backup, I got the CBT errors because the VMware guys had never used it. I worked with them so that now, when a new VMware client needs to be backed up, they run some script against the client to enable CBT before I add the client to backups.
But you brought up a good point. I was comparing initial backups on both applications. Let me run another full backup to see if DP numbers come down.
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I was thinking maybe the 2nd backup would be smaller by just picking up changes but it was the same size.