HK-2494 was indeed registered to a SADELCA Douglas DC-3. Aviation Safety Network (ASN) is currently listing this crash as a Douglas DC-3 built in 1945. Note that DC-3 production in 1945 was sidelined for production of military C-47 type(s).
A very substantial proportion of DC3s were originally built as C47s and sold into civillian service after the war.
There are differences including fuel capacity, cargo doors and engine types.