Biggest difference is the field of view. Comparing 10x EL and Pures, the Pures get you almost 20% more country in your field of view (measuring at 1,000 yards). The 2 benefits to the larger field of view (to me) are 1) more likely to pick up animals (esp. when using a tripod) and 2) the larger field of view makes things appear more steady when handholding.