I have both for my 3720 JD and can without ANY doubt the landscape rake is superior to the box blade in light, moderate gravel drive maintenence. I almost never use my box blade for this task unless I have gotten some fresh gravel that I want to pull into position, and frequently not then either. My Woods/Frontier landscape rake weighes 300# for the 72" width and has a rack on it that is meant for suitcase weights which will make it heavier. The results look as if the drive were paved. Now, I did not say which was the "more useful attachment" of which the BB is the better one, just which was better for the driveway. I have had both wheeled and non-wheeled units and for this use non-wheeled ones are fine (and less expensive). If you have the money to purchase both, I am sure you would find uses for each, for specifically for THIS purpose, if I were to choose one it would be the rake every time.
John M