I cant give any specific information on either of those systems, but I can say this... make sure your pump is rated to perform to at least the depths you intend to set your diffusers, and if possible, at a greater depth.
If the pump is rated for 12 feet max, and you set your diffuser at that depth, the pump will be operating at its maximum load, whereas if its rated for 20 feet, its operating much more efficiently at depths shallower than that, equating to a much longer service life.
.10 surface acre pond, 10.5 foot deep. SW LA. The epitome of a mutt pond. BG, LMB, GSF, RES, BH, Warmouth, Longear Sunfish, Gambusia,Mud Minnows, Crappie, and now shiners!!...I subscribe!!