Helpful tool for questions like these:

http://simulator.pokertips.org/simulator.php

vs. AK, two lower cards like 98 would actually fare better than QJ, because of the straight possibilities. It's a small difference, about 2%. It matters if they are connected, if they are suited, and how close to the king they are. Generally it's anywhere from 60/40 to 65/35 in favor of AK.