Yeah, same unit. I wonder how they got those. The first MKB42s were delivered in April 1943 to Army Group North (2000 weapons) to be tested by these units: 1., 11., 21., 212. Infanterie-Divisions, 93. and 18. motorized Divisions.
The next tests were supposed to take place with the MP43/1. However, there are other photos of SS troops using them, so apparently more were brought to the front:
Kinda weird the whole thing.