One piece quivers can usually be removed in the field where as the 2-piece can't. The two pieces are generally more rugged. The one piece can often make noise if left on while shooting.Two piece quivers can usually be adjusted either vertically or the angle where as the one piece is fixed. If you don't plan on removing the quiver either while in transport or while hunting then go with the two piece. If your case requires removing the quiver go with the one piece.