we tested both extensively when hypervm imploded
although at the time SolusVM had more features Virtualizor was the obvious choice although I have not played with solusVM in a while I think Virtualizor has the same if not more features now and the support for centos 6 with XEN is a big plus
Virtualizor is good, we had done a demo of the software by the makes of Softaculous. However, we use Xen, solusVM..... Our customers are happy with these virtualization softwares