This is just my opinion (I have done absolutely no testing), but based on the modules I have they are identical. My guess would be that they did the exact same testing on both and the difference is that the Pro line carried a longer warranty so if something went bad, it could potentially be replaced. In practice, I suspect it would be just as difficult to replace with a Home or Pro line component.
I had a XPFM (relay style inline module) that failed almost immediately (within a week). I contacted X10 and was told I had to go through the seller (a registered reseller from ebay in this case). They did help me exchange the module, but I seriously doubt the X10 warranty had anything to do with it. If it failed 5-1/2 months down the line, I don't think either the seller or X10 would have helped despite being within warranty period. Authentix may be different, but it sounded like WTI was not interested in helping.