Both are great hunting rests, it just depends on your preference.

The WB is tremendously simple...but does slow your arrow about 5 fps or so, and makes a little noise as the fletching passes through.

On drop aways, I have tried the Rip-cord and the QAD Ultra-Rest. Both lock in the up position, so your arrow is enclosed, like the WB. A drop away is great for accuracy, as no fletching contacts the rest (if it is set up properly) as mobowhuntr said. They do make a noise when they fall...some worse than others. The QAD seems to be the quietest of the two...but I do wish QAD would make one that is totally silent [&o]... However, I haven't had a deer yet jump at the noise, even at 10 yards. I don't think the sound travels very far, as I can not hear it on my brothers bow (also a QAD) unless I am standing right beside him. If you are unsure if you can tolerate the noise, I'd so go to a pro shop and play around with a few. I did this before I bought my QAD. I tried out the Trophy Ridge Drop Zone in the shop, and thought it was horrlby noisy...

Either way, you will have made a good choice.