OpenStack vs. RHEV

A few questions for comparison...

What is the ratio of RHEL OpenStack customers vs. RHEV?

When will RHEV-M be supported on RHEL 7.x?

When will RHEV-M be HA capable on RHEL 7.x (e.g. this would compare to the HA controllers for OpenStack as it seems OpenStack on RHEL is more enterprise ready)?

What are the advantages of using RHEV over OpenStack on RHEL? I would like to see a pros/cons in a compaison white paper between the two.