courses, and which one is the better one to opt for?
There are many things to learn in VFX like Keying, Rotoscoping, Tracking, Matching etc., Most of the course curriculum based on the depth/level of the subject they teach, in this case VFX. Many institutes teach and train the VFX students only with the fundamentals. MAAC ADVFX Plus will involve learning the subject to level next. Maybe like learning complete 3D with particles and dynamics, Camera Matching and Mapping, Motion Tracking, matching real world with CGI, Fluid FX, etc., In industry today concepts like roto, keying etc., is ok for beginners but to achieve that extra mile one has to go with advanced techniques.