Main difference is the stock. The Original sendero came with a HS Precision kevlar/composite stock. It came in either black or stainless and fluted/non-fluted. The new sendero is the same thing w/o the HS Precision stock. The current stock is made by remington and the main gripe I have - along with many other people i know - with the gun as well as many othersis the great swell of the "palm" area of the pistol grip. I am positive the new ones shoot as well as the old ones, but I just can't get aroung the increased size in that area of the stock. Tried talkin myself into one the last rifle I bought but just couldnt do it.