When we talk about the server virtualization solution from Oracle, Oracle VM has the server virtualization and management components in one solution. One of the reasons that differentiate Oracle from others is the full stack story.
At the virtualization layer, we have Oracle VM Manager included w ithOracle VM. Oracle Enterprise Manager is the enterprise management product providing an integrated management environment
for the full software stack together with physical or virtual environment. Specifically, we have Oracle VM Server for x86 and Oracle VM Server for SPARC, both offer high performance server virtualization solution, with advanced capability to help customers accelerate application
deployment. With Oracle Premier Support for Systems, the enterprise quality support includes server virtualization (Oracle VM) and the operating systems (Oracle Linux and Oracle Solaris).
A combination of hardware, virtualization, middleware, database and packaged applications, when combined with integrated management across all layers, comprises the best building blocks for streamlined operations and maximum agility in the data center. It also creates the underpinnings for the future in cloud-based deployments. Only Oracle’s integrated stack represents a virtualization offering that is application-driven and can enable deployment of complete solutions as opposed to just servers and operating systems.
Moreover, it's very affordable to get started. The base installation of Oracle Enterprise Manager includes several features free of charge with the purchase of any Oracle software license or Support contract. Read Base Enterprise Manager Functionality for the list of features that are included with the base functionality of Oracle Enterprise Manager, including Server, Storage, and Virtualization Management Features.
To learn more, read the blog "The case for Oracle VM".