A. Yes. CASA approved training facilities are authorized to undertake all aspects of the training and to work with CASA on the issuing of the qualification.
The other method is mainly for existing qualified pilots who have the radio and aviation qualifications and can simply undertake RPAS flight training and transition into the industry.
Training organisations that are NOT CASA approved are simply assisting with the RPAS flight training only and either try to train you quickly or guide you only on how to do the PPL and radio qualification study and exams etc. which you are required to do yourself. If you have no prior aviation experience at all we do not recommend this method of securing your qualifications. It is difficult, time consuming and expensive!