The initial velocity of respiratory aerosols depends on how they are generated within and released from the respiratory tract; for example, coughing produces droplets and aerosols released at higher velocities than speaking ....
Additionally, when respiratory aerosols are exhaled, these particles are contained in an exhaled humid plume with its own speed and trajectory, which also play a role in determining the final reachable distance and direction ...
.... removal from air by deposition on surfaces.
Again: there is an overlap in precautions and mitigation measures for both droplets and aerosols (such as distancing and masks)