Not a direct comparison, but I have a Tow Buddy 3000 for my Comanche. Only after adding a second deep cycle battery in parallel and changing the gear ratio by adding a larger drive sprocket is it up to the job. Moderate slope up to the hangar and a pretty good lip at the edge. I keep it on a trickle charger. Not sure how it's going to fare in the cold. You might be better off with a corded unit.
Overall, I would probably buy a gas powered unit if I had it to do again.
Ymmv.