The Dodge WC-10 and the very similar WC-17, and WC-26, are 1/2 ton carryall body trucks with slightly different engines and other small differences. All are part of the WC model series G-505, built by Dodge during 1941 or early 1942. If you don't have the vehicle dataplate, to differentiate you must know the U.S. Government registration number (Army number on the hood) or the serial number which can be found stamped on the left front frame.
Data from SNL G-657 Dodge Master Parts List. Other data on the Dodge G505 main page.
Dodge Truck, 1/2 ton, 4x4 G505 Carryall in use at an airfield in India, December 1942. The personnel are identified as Lt. Ronald J. Fruda, West Palm Beach, FL, Lt. Laurence D. Putnam, Portland, OR and radio operator Fishbaugh.