BudsGunShop.com - Difference between rifles?

Thomas, BArrel twist rate and Rear Sight option are the main differences. Some details here : tactical-life.com/firearms/del-ton-sport-evolution-echo/

Out of the two Similar looking ones buds has in stock not to much. This one the sport comes with a 1/9 twist barrel meant for lighter grain ammo like 50-62 grain and the echo comes with a 1/8 twist barrel Wich is preferred for heavier grain rounds like 62-69 grain rounds. Plus the echo has a rear sight Wich this one does not. Other than that couldn't find much of a difference. Hope this helps.