Here is the next comparison. Nacet Stainless (both are made in Russia). On the left we have a single wrapped pack, that has no manufacturing date on it. That places it between 2012 and 2015. On the right the new packaging. Manufactured 07/21. The pack itself doesn't have ©, but on the 100 pcs card there is ©2017.
Same method has been used. The only variable was the blade. Brand new blades have been compared for one shave each. No difference whatsoever.
@zoidberg You might wanna check this
P.S. Only two blades are left. Perma-Sharp and Iridium -Super.