What's the difference between plebeian and roturier?

Plebeian

Definition:

(a.) Of or pertaining to the Roman plebs, or common people.
(a.) Of or pertaining to the common people; vulgar; common; as, plebeian sports; a plebeian throng.
(n.) One of the plebs, or common people of ancient Rome, in distinction from patrician.
(n.) One of the common people, or lower rank of men.

Example Sentences:

(1) The whole phenomenon could be summed up in the familiar phrase, coined by the Romans used to describe their strategy for placating the plebeians – "bread and circuses".
(2) Just as Demirtaş is the current darling of the western ambassadors, so Erdoğan was a decade ago; the ambassadors took it upon themselves to smooth his plebeian edges and refine his worldview.
(3) In his last Russian novel, The Gift , he devoted 50 pages to belittling and mocking the writer and his circle, but admitted that there “was quite definitively a smack of class arrogance about the attitudes of contemporary well-born writers towards the plebeian Chernyshevsky” and, in private, that “Tolstoy and Turgenev called him the ‘bed-bug stinking gentleman’ … and jeered at him in all kinds of ways”.
(4) Again in Port Harcourt, I saw a convoy with sirens blaring driving down the wrong side of the road to avoid waiting like the rest of us normal, plebeian people.
(5) Perhaps he made his exit via the constituency’s Durham Tees Valley airport, barked through security with his shoes and belt in a grey plastic tray, the fate to which his foreign policy adventures have condemned us plebeian travellers.
(6) In other ways, Wonga is just a soft target, put in the stocks for angry plebeians to throw rotten fruit at.
(7) So it has been with the distinctions of slaves and freemen, nobles and serfs, patricians and plebeians; and so it will be, and in part already is, with the aristocracies of colour, race, and sex."