With respect, I take a slightly different view. RET (later renamed REBT by Ellis) is the first form of CBT and CT. Historically understood, Ellis's RET came before Beck's CT. More importantly, RET tends toward the amendment of beliefs/thinking in a profound schematic way (cf. Young's Schema Focused Therapy), but RET also addresses dysfunctional thinking in the immediate, conscious, steam of thought. Likewise, CT addresses the latter, but it tends not to address the former. RET does both. CBT scholars tend to claim their heritage in the work of Beck and CT; however, it may come as a surprise to these scholars that the theory and principles underpinning the practices espoused by Beck were actually espoused by Ellis some time before.
Tareq, REBT is simply a form of CBT. It was originally developed by Albert Ellis and is often use to help clients fight distorted thinking. As the name gives it away, REBT is focused on bringing rationality out of irrational thinking. For example, if a client all of the sudden thinks that they will fail at life because they failed an exam, an REBT practitioner will use different techniques to help them realize how irrational their thinking is.
So, there isn't a difference per say. REBT is just a branch of CBT.
Hope that helps. Visit http://albertellis.org/ for more information.
Agreeing, with Dr. Tsopfack, I also want to add that REBT is a more directive form of psychotherapy and the role of the therapist is like a teacher who actively builds a healthy and rational outlook or "life philosophy" and it is almost exclusively developed by Ellis.
With respect, I take a slightly different view. RET (later renamed REBT by Ellis) is the first form of CBT and CT. Historically understood, Ellis's RET came before Beck's CT. More importantly, RET tends toward the amendment of beliefs/thinking in a profound schematic way (cf. Young's Schema Focused Therapy), but RET also addresses dysfunctional thinking in the immediate, conscious, steam of thought. Likewise, CT addresses the latter, but it tends not to address the former. RET does both. CBT scholars tend to claim their heritage in the work of Beck and CT; however, it may come as a surprise to these scholars that the theory and principles underpinning the practices espoused by Beck were actually espoused by Ellis some time before.
This is a fun question to try to answer. In many respects, they are quite similar & arguably address the same phenomena with different langauge. But let me answer this question with a question: When approaching cognitive restructuring, CT adopts the Socratic method and RET employs disputation. These suggest different positions regarding the authority of the therapist and what the therapist knows. In practice, does translate into something significantly different? This is a genuine question.