vCentre Conversion Tool vs Converting a disk image into a VM

Hi,

There seems to be 2 methods by which to turn a physical PC into a VM:

1) Using the vCentre Conversion Tool

2) Getting a disk image of the PC and creating a new VM using that disk image

My question is are there any pros / cons of using either method or do they both produce the same result?

In my case, it's easier for the client to give me a disk image of the PC but I would personally rather use the conversion tool if possible as it's for the purpose intended.

Thanks in advance.