The events in October were originally called by the Bolsheviks the “Oktyabrskiy Perevorot”, and “perevorot” translates better as “coup d’etat” or “putsch”. So originally even the Bolsheviks did not see their takeover of power in the same light as the February Revolution. It was only years later that they attempted to make it co-equal by changing the name to “Oktyabrskiy Revolyutsiya”. So Solzhenitsyn is making a distinction that even the Bolsheviks made before they started rewriting history.
not to mention the american bolsheviks today.
there’s an academic art history journal called “october”.