Horizontal comparison of common desktop virtualization software

Currently, our commonly used desktop virtualization products include VMWare, Microsoft VPC, and virtual box. Of course, the most common is the first two. Virtual box is generally used in cross-platform environments, such as operating on both Windows and Linux systems.
I will evaluate their ease-of-use, performance, and functions based on my usage experience. The following evaluation is based on the Windows platform. The running status of 32-bit and 64-bit virtual machines is discussed based on whether the CPU supports secondary virtualization.
Software Version:
VPC 2007
VMware 1, 6.0
Virtual box 2.0
First of all, in terms of performance, virtual box is basically less competitive than Vm and VPC. The running speed of various computer configurations is worse than that of the latter two, and there is no special function, in the next discussion, we will ignore it for the moment.
Next, let's take a closer look at the performance and functions of VMS and vpcs. First, on a machine that does not support CPU virtualization, the performance of VMware and VPC is basically the same, VMWare is slightly higher. However, VMWare has a very large feature that allows you to easily create a 64-bit System Virtual Machine in VMware and run it with high performance on a 64-bit host with 32 systems installed. This powerful feature is not comparable to other desktop virtualization software (x86. It is said that in a 32-bit system on a 64-bit host that supports CPU virtualization, VPC (x86 version) can create 64-bit virtual machines. I have not verified this statement, let me talk about it. Of course, in a 64-bit system, VPC x64 can easily create a 64-bit virtual system.
VPC supports CPU-assisted virtualization on servers that support CPU virtualization. With the help of the CPU, the efficiency of running virtual machines in the VPC will exceed that of VMware that does not support CPU virtualization. In addition, this performance improvement is obvious. I wonder if the VM desktop version will support CPU-assisted Virtualization in the future.

The above is just some of my personal experience. Please advise the experts to make mistakes.