I concur, from looking at the inventories. Besides the klickies and the flashing light unit, they are almost identical, right down to the accessories (a couple have been replaced with identical items with updated part-numbers). However, most obviously, they have different numbers on the body of the truck - 3879 is number 52, while 3182 is number 112; the latter came with stickers of a variety of numbers to paste over. The bumper with the license plate is not numbered on either set of instructions, by the way.