You will get many opinions on this, and most of them will disagree with me. Which is cool.
Let them be (the honeybees, not the dissenters). Honeybees naturally move up during winter following stores and their own heat. Once the season starts, they will backfill the super and move down into the deeps in their own time. The same thing happens in a gum.
You nailed the risk of smoking them down. They might not be ready, and removing them from their food and heat could be deadly if the weather doesn't cooperate.
Better yet, "smoke down" one hive and leave the other alone. While two colonies does not a scientific test make, report back on your results so we all can learn. I am doing the same.
Milton Township, Michigan (near South Bend, Indiana)