Outpatient forensic psychotherapy is a growing field of work in many Western and perhaps also Eastern countries. But the study situation so far seems very limited. My search refers to the best available evidence.
Wow, starting to respond to your question sent me on a tangential whimsical foray to "No, not likely."
First offending and criminality are looked at from a wide range of orientations and approached from competing assumptions, so comparative data are problematic. At best we have quasi-experimental studies, but even those are subject to profound bias, sampling errors, inadequate measuring, and high drop-out/poor attendance rates.
One issue is with the term psychotherapy. It is vague and suffers from a range of interpretation. In treatment approaches to offenders, it too often refers to a teaching format rather than to a therapeutic process facilitated by well-trained and experienced clinicians. Regarding the latter, when research findings are applied in treatment programs, they most likely use inexperienced or para-professionals to educate offenders.
The most common measure is recidivism, that also has some variance in definition and and measuring. We really need a colloquium of clinicians to define current understanding and bring some definition to the field before your question can be adequately answered.