I think this may be talked about but done so without knowing. We typically use the terms "sharpness" and "smoothness" in reference to a blade's performance, but we could use "bevel angle" and "polish" instead.
Often in comparisons of one blade over the next, the term "sharpness" itself could be substituted with "shallow bevel" seamlessly. So, sharper blades tend to have shallower bevels. I would guess that Feather has the shallowest bevel grind.
Then, the term "smoothness" simply refers to the polish and uniformity of the cutting edge. A smooth blade will have less visible scratches under a microscope and will have a straighter edge under a microscope. To stick with feather, my guess is that they would look rough under a microscope (compared to say a Red Personna).
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