Did the Soviets have influence? Yes. Were they "occupiers?" No. Nobody is arguing that the soviets did not have any influence whatsoever, and it seems we are both getting caught up in the difference between "occupation" and "influence."
I would agree that we're both caught up in the difference between occupier and influence. However, I think it's an important distinction. My argument hinges on the fact that both the US and the Soviets decided to occupy the peninsula during the Moscow conference despite the pleas from the representatives elected by the people of korea.
Now I do think there is a distinction between the two countries behavior in that an occupation is by definition a temporary status. The Soviets occupied North Korea for less than five years while the US have defacto colonized South Korea.
I wouldn't claim that the Soviet union colonized, annexed, or even invaded North Korea. However, I do think they occupied a country that did not want to have their independence stripped away via initiating a trusteeship with another great power.

