No idea on those two, we have a Sea Recovery unit. It's one of their ultra efficient series. 300 gal/day at about 16 amps. so just over 1 amp/gal. the 400 gal/day unit burns the same power but has a larger membrane so is more efficient. It is auto everything so it's just push the button and it takes care of itself. After my research it came down to either this unit or a Spectra. Energy consumption per gallon was a key requirement for me.