Equal overhang is not what you want. You want the ability to angle the board the same on toe and heel side. You'll notice the maximum overhang on the heel side is much higher than the toe overhang. As a result, you can frequently get away with more overhang on the heel. Watch this video. It will give you some insight.
How to determine the best board width for you. - YouTube
Thanks for the helpful video. One question: assuming we have a correct width board, how do we determine how much heel versus toe overhang we should have for maximum control of our board?