Well... there is historical evidence that centrally planned dictatorships are not a very responsive form of government.
Now, corporations usually have the problem of competition, so if they aren't responsive (or at least responsive enough), they get out-competed by those that are. Is that enough to make them different from governments? Perhaps, but I don't know.
If you don't think there are competitions in dictatorships you are extremely sheltered. The competition in a dictatorship is whether you stay alive or not, just like in a corporation is whether you become homeless and die or keep a roof over your head.
Now, corporations usually have the problem of competition, so if they aren't responsive (or at least responsive enough), they get out-competed by those that are. Is that enough to make them different from governments? Perhaps, but I don't know.