There is no comparison to the two. I have been a Sumo dealer back in the early 80's and sold the Original Andromeda as well as the Andromeda II and the Nine. The Andromeda was a Bonjourno piece, all bipolar outs, very tight and controlled, very fast, but lean and a bit dry for my taste. The Andromeda II was not a Jim Bonjourno piece, this is after Randy Patton bought the company, Jim would not use mosfets at that time. It was a bit better in the mid range as well as not as dry on top, but not near as controlled on bottom nor as fast in its overall presentation. The Nine is just a fabulous sounding amplifier. Other than power, it lunches both of these amplifiers in every aspect. A year or so ago, I picked up a Sumo Nine and had Ed Martin of the old Marcof Electronics do extensive mods. Litz hardwired in and outs, nearly tripled the filter capacitance, replaced the bridge rectifiers with newer higher voltage pieces, tons of better resistors and alot of electrolytic replaced with pure polypropylene caps. This improved every aspect of an already very nice amplifier. The bottom is more substantial, everything about the wonderful midrange and top end stayed in tact and it lost the slightest bit of grain that it had. This has turned out to be an outstanding amplifier for very little money on the mods.