Well, mr. Schwarz's investigation method is a bit dubious, but the question still remains. Are the new LN and LV planes really better then the vintage planes? And in what respect are they better?
I can't compare, because I don't have new benchplanes. But I have another example. I like to use both my Stanley #4 and my wooden coffin plane. The Stanley is certainly easier to use, quicker to adjust, not warping over the year, quicker to sharpen with its thinner blade. But the woody is lighter, has less friction, feels better in the hand. All in all, when the going gets tough, I tend to reach for the Stanley. Both are as perfectly tuned as possible for me.
At the other hand, I have a Chinese Quengsheng blockplane and a Stanley #18. Both are prefectly allright and I have no favorite.