Good question. I am trying to decide between these two bows for my 13 year old son who has a short draw length.I think the Edge is the hands down choice over the older Adrenaline, but Browning completely revamped the 2007 Adrenaline.The guy at my local pro shop tried both and couldn't tell the difference. I think the Edge is listed as faster and about $30.00 less. Curious to see what others have to say.