Curious, how is the effect different? would there be any current change with due to the drop off ? I guess im having a hard time visualizing how it would not create dead spots or current issues
Building a wall of rocks and having a tank that actually has a built in dropoff will and does look completely different. Dead spots and current issues are solved with the right equipment and proper placement of the appropriate equipment.
Maybe hard for you to picture, once I get photos you will see what I am talking about.
Not saying you cant create a drop off reef with a tank that was 40x24x40 the entire length, but to get a true drop off you would have to block off the corner otherwise its just a big tall tank with a bunch of rock on one side.