Backup Exec 2012 vs Backup via VMware agent vs Backup via Windows agent

Hello,

We have about 15 servers that are all VMs within VMware ESX 5.1   (ADS, Exchange, SQL, file server, etc..etc...)

Actually we have 15 backup jobs that backup each single servers on B2D storage, (backup files for each server go to a folder name that is the same as the  server name).

I've been told that we could use VMware agent to do all of our backups.

Can someone explain what would be difference between using vmware agent instead of how we do it actually ?

What are the pros and cons ?

Is there any benifits of doing it via VMware agent ?

Why would we use MVware agent instead of what we do now ?

Thanks for the clarification.