Check out my video review here, I applied High Speed Wax and Brilliant Shine Detailer on opposite sides of the hood and show the difference in the water behavior you'll get:
www.youtube.com/watch?v=TsAkzhzwp3c
Here's my video review of BSD by itself:
www.youtube.com/watch?v=os3SyYcJs5Y
Overall two great products, BSD is less slick but the durability and water behavior is one of the best on the market right now if you like that kind of feature. High Speed Wax is a great maintenance product for other regular waxes or sealants when you want to keep up on the slickness and beading, but if you want to amp the beading up to another level or you're trying to work something on top of Polymer Net Shield, then BSD is the one to go with.