Exchange 2010 R3 GRT Backup (Using VMware and Native Backup)

I am having issue backing up Exchange 2010 using VMware agent. The backup takes very long time. When I backup the same exchange server using Native Backup it only takes 2.5 hours. Both Native and VMware backups are GRT.

Just wondering what VMware agent back takes 8 hours. Is there any patch that solve this issue. Media Server shows "Updating Catalog" and it sits there for hours.

We had same issue with SharePoint and I end up not using Symantec backup exec. for SharePoint. Same message updating catalog and it takes 15 hours.