Jon, this is awesome, many many thanks! ... I was looking for this kind of information for a very long time. All the instructions that are around for disabling vMotion compatibility checks do not work for vCenter 5.x, but these advanced settings really do the trick.
I tested this in the lab, was really able to vMotion from AMD to Intel (and vice versa). And I had to write a blog post about this: http://www.v-front.de/2013/04/how-to-vmotion-from-intel-to-amd-and.html.
- Andreas
