ICM has threee versions of the WW2 Studebaker truck, and Italeri has two, according to my quick search on Scalehobyist. I'm currently building the Italeri with Katiusha rocket launcher, and am finding it to be a good kit; lots of small parts but fun. I'm adding the Eduard PE which adds even more small parts but has better details for the rocket fins, cab shields and other stuff that's hard to mold in plastic.
Happy modelling!
Mike