Straight razor ... something about the carbon steel, perhaps?
It's a funny thing to say because I am one of those kinda "all in" fellows but maintaining straight razors is not for me. I don't enjoy it. Continuing that idea, using disposable straights like the vintage Weck system is something that I find very enjoyable but absolutely not the Feather Artist Club system. In the middle, I have a Feather Custom Razor which takes both the Weck-style and the slightly thinner Feather Cut blades - those, I really enjoy! There's a real sing to those blades, not dissimilar to a good hollow ground.
I do have some vintage Weck Sextoblade blades which are serviceable and found them to be very nice indeed, almost to the point of a real straight razor experience. Likewise, vintage Durham Duplex blades which can be rehoned give a really ... err, milky shave.
... so, maybe it's just something in the feel of that material on the face.