libvirt users - Mar 2015 - kvm/vmware side-by-side?

http://libvirt.org/drvvmware.html says "The libvirt VMware driver should be
able to manage any Workstation, Player, Fusion version supported by the VMware
VIX API."

1. Does this mean it supports the vmware hypervisor, or just that it understands
the disk images and perhaps other cotnrol file info?
2. If it supports the hypervisor, does this mean that kvm and vmware hypervisors
can be running on the same host?  I've read statements elsewhere that they
are incompatible.

I'd probably be running VMWare Workstation 11, though I could get Player or
vCenter Server if it mattered.

Thanks.
Ross Boylan