VirtualKaty 6 vs. Ediload and Conformalizer

[V5V]

I've read some past threads about reconform software and have noted the recommendations for Ediload and Conformalizer. What my search of the DUC didn't turn up was any discussion of VirtualKaty. Is there a reason for that? Is there some inherent advantage to the others?

I discovered I have an old license for VK Conform which means I can get an upgrade to VK6 for the same price as Conformalizer -- USD$500. What I don't know is whether I'm better off doing that or buying a new Conformalizer license.

Has anyone here used both or done more in-depth comparison? I'm new to using an automated approach to conforming picture changes so I'm not well equipped to evaluate the relative merits based on descriptions on web sites.

Insights and/or recommendations are welcome and gratefully received.