since you seem to think SL doesn't know what he's doing...
No, that's not true at all. I think he is a brilliant man and a founding father of the industry. I have a lot of respect for him.
However, as loudspeaker designers we go about things very differently.
For instance, I am sure he has good reason for testing tweeters for high powered inputs at 1,500Hz as that is the crossover point that he uses in his Orion. He has limitations with that design that dictate he consider that factor. For one, the 1,500Hz range is about the limit of how high that metal cone woofer can be used if all of the cone break up is to be eliminated with the network.
In another application the Neo 3 is going to have clear advantages, especially if you start listening to them.
While he is very focused on distortion numbers, I tend to focus more on stored energy, spectral decay rates, in room responses, and subjective comparisons of drivers and components.
I am not knocking him, and he is not knocking me. There is no king of the mountain contest here. Our products will speak for themselves. And the people will speak with their wallets.
If you really insist on making such comparisons then I suggest that you make arrangements for some comparative listening like a local (local to me) Orion owner has done.
And by the way, the Neo tweeter used in all of our kits is a custom version, not sold separately, and not available from any other sources.