I use the whisker biscuit for the main fact that I hunt on the ground alot, and I am always sneaking around in thick brush to crp. If I am stalking a deer, I have an arrow knocked, and I don't want to have to worry about it jumping off my rest.
From everything that I have read, heard about, and seen, you will probably get just a little more accuracy out of a drop away rest. But unless you are a 3 D shooter, where an inch counts on accuracy, you will shoot great with the wisker biscuit.