As per the title, I have received some conflicting information which I would like to clear up.
In a nutshell, an F1 visa pertains to an academic course which allows OPT and the M1 is for vocational courses (I've never seen any mentioning of work).
After coming across this website (clearly official and therefore reputable) on point B (under benefits) it is mentioned that work is indeed possible.
M1 Visa - Easily Apply Online - Study in Vocational Institutions in the US
