Misty Step, a level 2 conjuration spell, allows you to teleport anywhere within 30 feet of you so long as you can see unoccupied destinations. Dimension Door, on the other hand, is a level four conjuration spell that allows you to teleport anywhere within 500 feet. Dimension Door can also bring along someone else, something that Misty Step cannot do. Dimension Door is an overall more powerful spell, which is evident given the differences in their levels.