That is not an old Double Carbon or the new Carbon Elite. It is a Chimera which means instead of the back of the bow being glass like the belly, it has a layer of carbon. The Chimeras are typically 4 to 5 fps faster than the all glass bows. In this case it is only 3 fps quicker but the yew and bamboo in the glass bow is definetely a winning combo. A 1/2 of a pound difference could also make up for a foot or two difference. So basically the chimera is 4 to 5 fps quicker than the all glass bow of the same draw and poundage and the Carbon Elite is another 3-4 fps quicker than the Chimera. It may not be a ton of difference but for some who want the most efficiency from a bow, it can mean shooting anywhere from 3 to 5# less given the circumstances, and not loosing any performance. Also the engineered carbon limbs are lighter in weight than the glass faced limbs making for an even more "dead in the hand" feel after the shot.
Jim Neaves