There are many things affecting how smooth a shave is: shaving angle (different razor got the tangent line between cap and base plate at different angles), the blade gap, the blade exposure.



If the geometry is the very same, when looking at the razor head from the side, there is no real advantage for one over the other. Because of this we have seen reports of how Wolfman razors shave about the same regardless if they are OC or SB.



Many OC razors are extra smooth because of the small gap they use (for example Parker 24C/26C). The OC design allows to go to smaller gaps without clogging the same easily. Not all OC razors do have small gaps and some will feel rough.



Personally I prefer OC razors with small gap over SB razors.