I've just spoken to Peter, designer of the AA LPS for SG energiser.
He's emphasising the energiser is a regulated unit, so one doesn't want an LPS that further regulates the power. Hence the AA unit is not a regulated LPS (P Hynes, K Lau, SBooster etc are all regulated).
It uses two v big custom inductors, normally seen in power amps, to smooth the supply. These are used with a huge low-field mains transformer, and a custom Schottky bridge w special caps.
In addition to this LPS not regulating the supply to the SG energiser, obversely this unit shouldn't be used to simply power other 24V dc gear that requires regulating. It's solely designed for the SG and nothing else.
My only points of comparision are the stock wall warts and Vinnie Rossie batt psu, and the AA handilly beats both. Critically, it's been trouble free too, never tripping the energiser like the batt one did regularly, even w power outages in the area.
My analog is absolutely compelling atm, and the AA'd SG is a critical part of this.