It is really interesting that so many of the apparent differences between our approaches seem to vanish when examined closely. I wonder if we have a case of convergent evolution?
Aaron Becks initial training was psychoanalytic and he departed from it when his early research into depression produced results which were incompatibly with the psychodynamic understanding of depression (depression is hostility turned inward) which he had been taught. After years of research, clinical practice, and discussions with colleagues, Cognitive Therapy evolved.
From what I have read, Control Mastery Theory has a somewhat similar history and it sounds like the two approaches have separately come to similar conclusions. My sense is that Cognitive Therapy has been more strongly influenced by behavioral approaches than Control Mastery Theory has been, but it sounds like the differences are more on the technical level than on the conceptual level.
I am looking forward to learning more of how therapy with Caroline progressed