Fins vs Canards
Canard control - Good lift/latax control for moderate angles of attack. - Shed vortices can interfere with tail to generate roll moment. - Tendency to stall at high angle of attack-alleviated by fixed front canard.
Fin/tail control - Efficient packaging of subsystems. - Low hinge moment/acutator torque because of relatively low angle of attack. - Low induced roll moment (shed vortices are behind and do not interfere with other components). - Good efficiency at high angles of attack. - Poor lift/latax control for statically stable airframes because of low angle of attack. - Sometimes used with guidance vanes in rocket plume.