Yes to all of the above...
I think that the polsiiver are better bladeThis evening, I revisited the Feather. It's been a quite a while and I thought perhaps my technique has improved to where I may enjoy this blade. I certainly like the sharpness, but it was a rough shave. I'll stick with my Perma-Sharp Supers and Polsilver SI's.
Yes there is a difference from a blade to another. Re-visit the Lord in +6 months, you will probably be surprised..
Well, actually not the blade but your technique improves which allows you to realize the differences in shave gear.Agreed. I've found that some blades improve with age.
For me the same blade is horrible in a one razor and wonderful in another.
Experimentation is they key to what works best