The levels were in a completely different order in the USA version. The final stage was in the USSR. After defeating team USSR, you would fight clones in the USSR stadium.
So in the US version you start in the US and end in the battle against the USSR, idk where. In the JP version you start in Japan and end in the US. This actually makes a lot of sense, glad they changed it as it would make less sense if Japanese players started in the US.