Except a few, I have used almost all the blades you mentioned. And sooner or later they all disappointed me because their performance was not constant. Furthermore, I always use the same razor, a long-handled Merkur.
And then I wanted to try the Kai thanks to the excellent reviews I had read in this wonderful forum and on my blade supplier's blog.
I've been using it ever since.
Kai, Kai, Kai. the cut is always smooth and sharp to the point and I use the same blade for at least a week.
The consistency of production quality is remarkable. After thousands of trials, I have encountered less than 5 blades that were not smooth on the first cut. However, I left one of these inserted in the razor in the second house, left closed for the winter for 2 months!
And then I wanted to try the Kai thanks to the excellent reviews I had read in this wonderful forum and on my blade supplier's blog.
I've been using it ever since.
Kai, Kai, Kai. the cut is always smooth and sharp to the point and I use the same blade for at least a week.
The consistency of production quality is remarkable. After thousands of trials, I have encountered less than 5 blades that were not smooth on the first cut. However, I left one of these inserted in the razor in the second house, left closed for the winter for 2 months!