Mike
you are comparing apples with peers ...
EZP2V, UP2V and not to forget Markus Debus' FIXIDE are little command-line-tools for offline-system-patching.
EZP2V has a focus on ESX as target, FIXIDE is useful for Workstation and UP2V is useful for both VMware-variants.
I see no point in rating them against each other - all three are little and if you are clever you have all of them in your toolbox and use each when it fits best.
My MOA project is a platform you can use to run any of these 3 tools - you can use MOA or UBCD4Win or Reatogo or XPE or roll your own PE to run this 3 mentioned tools.
For P2V-admins MOA certainly is the best choice of platforms as it already comes with very useful VMware-tools like vdiskmanager, importer .... not to forget VMware-workstation which can be used to create all kinds of VMs or convert physical disks into vmdks ...
By the way - I don't see that VMware's free Converter will ever replace the three free tools in your toolbox ...
Ulli