Ruffs & Drags - The Same Rudiment?

Ruffs, ruffes, or roughs have existed in the English speaking world since the 17th century. In the late 18th the term drag or dragg became common, sometimes styled the half drag, and sometimes referred to as either open or close(d). This same sticking can also be called a 3 stroke roll, ra de trois, tra, vra, vri, ran de 3, ra, rau, ran, ruf, kurze wirbel, kortruf, raf, 3er ruf, halbe ruf, di, and several more... but are all these the SAME rudiment? I have my doubts... I am not 100% sure of my position in this video, but there is evidence on my side. Buy a book: http://bloomdrums.com/books