UO Konig vs. Konig II

Anyone know how the newer "Konig II" eyepieces from U.O. differ from the older Konigs?

Well, after a little bit deeper searching I found some consensus that the older Konigs are 1-2 (3 element) eyepieces and the newer ones are 1-2-1 (4 element) eyepieces...

1. Anyone say otherwise?
2. What's the difference in performance?

I have an older 16mm Konig which I've used a few times, and I love it, but it's a bit weird. Very large AFOV, but very tight eyerelief. Sharp and bright as all get-out, though. Barlowed, it gave me the best view of M13 I think I've ever had, a couple of weeks ago. I have a 12mm that I haven't tried out yet.

Curious as to how the new models differ.