The person you compare yourself with may be spending resources you need elsewhere.

Comparison usually looks at output and ignores the budget behind it. The colleague producing more may have no one at home who needs them at six, or money that buys back time, or a tolerance for a kind of strain you have decided not to carry. Their result is real. The conditions that made it are not available to you, and might not be welcome.

Catch yourself measuring, and ask what the other person is not spending their energy on. Then look at where yours is going, and check whether those places are the ones you actually chose. If they are, the comparison has nothing left to tell you.