I did some more research on the Bosch site, and it's a power delivery of 28 / 68 Nm, depending on the mode or level you configure. The 18V-55 model has a maximum power of 28 / 55Nm, but is equipped with a brushless motor. Which is much better, of course.
Torque (soft/hard/max.) 28/63/- Nm VS 28/55/- Nm (brushless)