The differences between Affect Phobia Therapy (AFT) and Intensive Short-Term Dynamic Psychotherapy (ISTDP) are very small. Both methodologies are very similar, and achieve the same powerful effect through a highly similar technique. They have the same origin, it has only come to this point despite plans to bring the two together, because of the death of the founder of AFT.
Read more about Affect Phobia Therapy (AFT) here:
https://www.nvpp.nl/behandelvormen/affect-fobie/