Just so that you dont get further 'confused', here something you must know (as regards to medical branch):
General Duty Medical Officer (GDMO)
Child Specialists (Classified / Graded Specialists)
Gynaecologists (Classified / Graded Specialists)
Skin Specialists (Classified / Graded Specialists)
Medical Specialists (Classified / Graded Specialists)
ENT Specialists (Classified / Graded Specialists)
Radiologists (Classified / Graded Specialists)
Anaesthetists (Classified / Graded Specialists)
To add further, unlike the Army, you got to have a MBBS degree before you join the medical branch of the PAF.