The tables also showed that the economic differences between the vertical axe, Slender Spindle, and Tatura are minimal. 

Although additional statistical information on the Marchand and MIA system were unavailable, we would most likely categorize the Marchand with the 4 wire trellis, and the MIA with the Tatura system. The reason is that structurally, the Marchand system, and the standard trellis use the same type of support.  The only difference is tree positioning. Similarly the MIA, and Tatura or V trellis are placed on the same angle, except the MIA's angle is inverted.