What's the question behind your question?
Great question!
[FONT=Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif]Philosophy is really on the instructor.
Curriculum and training minimums are agency.
I believe all agencies want to produce great divers.
I did my recreational training under PADI and technical under TDI. I didn't have PADI rescue at the time so I went TDI instead of PADI TecRec. TDI provided a much shorter path to my goal. My instructor[/FONT][FONT=Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif] is a member of both agencies.[/FONT][FONT=Verdana, Arial, Tahoma, Calibri, Geneva, sans-serif]
I would have received the same quality of education/instruction because of my instructor's philosophy of teaching and pushing me to be a model diver. He always added value by teaching skills acquired from all his experiences as an instructor and student. Continuing education is important for all divers.
Ask yourself what kind of diving you want to do.
Ask around to find a great instructor that actually does that type of diving and does so outside of classes he teaches.
Then look at the prerequisites, knowledge to be acquired , and skills for each agencies' courses. [/FONT]