system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] How much more powerful than Mjolnir is Stormbreaker?
gpt
Many orders of magnitude. It's hard to say for certain, because we don't have anything resembling "power levels," but look at it this way: 

If the Bifrost is left open too long, it could destroy a planet. Stormbreaker can channel the bifrost. In theory, one could use Stormbreaker to destroy worlds.