I'm planning to build my B6D with the machined shock bushings and machined shock pistons.

For the bushings I'm using AE 91494, but for the Pistons I've been debating between the AE machined and the Schelle. I'm leaning twards Schelle because they are sold in packs of 2 while the AE pistons come per 4 pack (I'm planning to start with the kit setup of 2x1.6 & 2x1.7). Any reason why the AE machined Pistons would be better than the machined Pistons from Schelle?