Don't you feel like it has to be both? Even major body work proponents like Van Der Kolk say that their therapy is still very talky.
Yes - but there's a difference in how the work progresses, and what the client is being asked to monitor. The more 'brain-work' people like Shapiro believes in the connection between trauma and the body as well - and both modalities let the client describe things however they like.
Same goals - re-intregration of traumatic memory to resolve trauma disorder symptoms. Different techniques.
This is a case study written my a somatic practitioner. It's a bit of a long read, but it's really illuminating.
Healing Trauma Somatic Experiencing
From the article:
By focusing on one aspect of her physical sensations, we will be led into her body’s memory of the trauma. By moving slowly, and utilizing various techniques that prevent re-traumatization, her body will guide her through her own natural set of experiences, and gradually release the stuck pattern.
Something that is unique about the somatic approach is that 'aspect' idea - sort of like, all roads lead to Rome. You can take any entry point and work your way through. Then, you are always working with how the body responds, it's the metric, in a way.
Whereas, in EMDR, the metric is more focused on cognition - how much negative charge a specific thought is carrying. If you are naturally attuned to your body, you're going to be aware of how your whole system responds to thoughts becoming neutral. But if you aren't, it's not necessarily going to be pointed out to you.
This interview with Francine Shapiro (creator of EMDR) is a nice, short read, and talks a little bit more about what the rationale behind the process is. She also addresses PE and CPT:
Using EMDR Therapy to Heal Your Past: Interview with Creator Francine Shapiro | Psych Central
I think what's important is that once the content of the trauma is articulated - you could call it the plot, the arc, the story...whatever - each modality will proceed through that content in distinct ways. All of those ways provide a framework. And a good practitioner will be working within a framework that is very comfortable to them, and they will be able to guide the client through it in a fairly elastic way (meaning, they can respond to the individual quirks of processing that each person has).
But there's a structure.
'Talk therapy', just as it is, will apply any number of different tools from any number of toolkits - but it's not a structured process. It would kind of fall apart if it were, because it very much needs to be driven only by the present needs of the client.
But someone seeking trauma therapy has a more specific need to address - they are having trouble with their past experience(s) interrupting their present life. And simply talking about it, with no plan at all, isn't really going to be most effective for most people. It still might help, but it also might not.