You wouldn't need to, as pjotr is a SE user, he would have heard/used the huge variation in SE blades surely. Everything from shaving to scientific use, to paint scraper blades. Blades are different.
Bottom line, some people have no real stubble to shave, like their beard is like body hair.
Some brands don't bother sharpening that much to save money and sell to the those people who happily pay less for it. Others will make and sell to the slightly tougher stubble crowd with slightly more minimal sharpening. Other blades offer that, but with better steel so they last longer for the crowd that would pay slightly more for a blade that lasts all week.
If your stubble is like wire though, you will notice a huge difference between those types of blade compared to the sharper ones. Blades are made out of different steels and sharpened differently.
Even with SE blades, I got some shockers I couldn't shave with.
edit: But yeah pjotr mentioned DE blades specifically. I can't shave with derby, israeli IPs only work in some razors. They may be two blades pjotr hasn't used for all I know, but they are the two blades that have been very different for me. Derby just plain sucks, the IPs only work in some open combs, just bad in a TTO for me, got heaps of blades so tried them heaps of times in many different TTO and adjustables.
