To my face there isn't much difference in most blades. There are bad blades, that are just rough (I have Derby in that category). There are ultra sharp/smooth blades (Feather/personna). And then there is everything else. I don't notice much difference in most of those inbetween blades.
For me Personna is my standard blade that I compare all others by. Most are on par with them, very few are any better, to me. YMMV.
For me Personna is my standard blade that I compare all others by. Most are on par with them, very few are any better, to me. YMMV.