It would be interesting to know whether Diamond have included any design features to reduce the energy transmitted in a "vertical" descent - I suspect not. Cirrus have done so and therefore in terms of the energy transmitted to the POB I suspect the two are less than comparable.
In the event of a forced landing I think the author and Diamond should be careful about making out the POB are likely to have the same "protection" that a CAPS descent in a Cirrus might afford although over the "wrong" terrain and in the "right" weather conditions it just might be a better option than a conventional forced landing.