While I dont doubt that a fuel injected 2 stroke is far more efficient than a carbed one, there's just no way that an engine firing 2x as much as another one is "just as" efficient. 4 strokes will always be more efficient and quieter. The trade off is power. 2 strokes are known for the instant power because they have an extra stroke in the same amount of time.
RIP Evinrude
While I dont doubt that a fuel injected 2 stroke is far more efficient than a carbed one, there's just no way that an engine firing 2x as much as another one is "just as" efficient. 4 strokes will always be more efficient and quieter. The trade off is power. 2 strokes are known for the instant power because they have an extra stroke in the same amount of time.