Much better page with many more ships and interactive comparison

Impossible to compare Star Trek and Star Wars because neither is very realistic.
Consider the Death Star: If your power plant is produces enough energy to overcome the gravitational potential of a planet and literally blow it up, then your wasting your time focusing it into a beam. Why not disperse it into to field effect weapon and have a “laser shot gun” that will take out the whole rebel fleet (even snub fighters)! Then turn around and use the same beam to sterilize the planetary surface.
Star Trek is just never consistent enough to judge. In TOS, its strongly implied that the Enterprise can destroy entire planetary civilizations and routinely time travels. But these capabilities seem to appear/disappear depending on the story.

@deleted_user

The space slug is from an obscure ’80s movie
The Halo is not a planet because it is not rounded by its own gravity.

casemods: I believe the explanation for “gravity” on Halo is that its generated by centrifugal force.
Gravity or centrifugal force, doesn’t matter. One of the defining characteristics of the Halo is that it is not round therefore it is not a planet.
Hint: try clicking on the links and reading the articles that I am linking to. Also I’m pretty sure it’s not a natural body, but I didn’t follow the story much.