No, you won higher taxes to pay for the development of two spacecraft instead of one.
Then again, putting all one’s eggs in one basket is a poor bet if that basket fails ... sometimes it is better to pay a bit more to achieve a very difficult task. Personally, I’d go with all four, just to learn which one actually does the best job and screw the cost.
Higher taxes are not the fault of the cost of utilizing one or more designs, but of retarded US tax policies playing the zero sum game.