Comment by krzyk

Results also depend on the prompt. You get different results if you ask to review the PR and focus on particular file than if you don't make it focus.

Or if you make it "be a security engineer" with particular focus points.

Or make it a grammar nazi, it will find way more typos than without such focus.

Of course all of those "focuses" needs to be in a separate context (agent/subagent) to make it work.