Case based learning is relying on speciality, however, PBL is mainly integrated. Also I suppose more intervention from the tutor as a facilitator in CBL rather than in PBL
This is part of a communist way of thinking. You need to read Charlotte Iserbyt's Back To Basics Reform and The Deliberate Dumbing Down of America. You need to go to abcsofdumbdown.blogspot.com and deliberatedumbingdown.com to get a REAL education on O.B.E. or Skinnerian International Curriculum and why it is VERY dangerous to the our educational system.