Here are the only "Facts" I have ever read on actual sharpness tests being done on DE vs SR
The Voerhaven paper states that the "Sharpest" edge they measured on a DE was .31~ microns
The sharpest edge they measured on a SR which THEY honed and stropped was .32 ~microns
If you don't believe it, his contact info is at the bottom of the report
As to angles,
Most DE blade have a Double bevel Tim Zowada at one time had some great Micro Graphs of them on his website, one of the Feather blade had a Tripel bevel
This is done to create a stronger more concave edge, much like how we work a SR edge on the hones and strops.
The final angles are in the 20° range on the DE blades, I am pretty sure I am remembering that correctly
Smoothness
On a SR we use our strops to tweak in the edge for the most comfort possible from the straightest edge on what is commonly called the "Fin" or very apex of the edge.
On a DE they machine grind the edge and then apply Coatings to smooth it out after the grinding, what I remember reading was that Feather used the highest grinding wheel at 3000 grit I would be hard-pressed to find that again but you might be able to sniff out more info now ..
That is all I can tell ya
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