Okay, we're good.
Parham posted measurements in detail on his PI Speakers site. I do not have examples of either horn lens in house at this time. Compare them if you wish.
I use ESLs, Linkwitz Orion, and a couple of pro driver type two way boxes of my own design. Neither design uses horns, but planar magnetic tweeters. I'm working on a line array currently. Obviously I have too many speakers. There are others currently in storage, including horns.
steve