Noise: lower on Mani 2. Like 10-15dB lower. THD: Also way lower on Mani 2. Gains: tweaked a bit, but pretty close to Mani the Original. Loading: Mani 2 adds a bunch more options versus Mani: Selectable R load of 47KΩ, 200Ω, 47Ω, or 38Ω, and selectable C load of 47pF, 100pF, 150pF, or 200pF LF Filter: Mani didn’t have any low-frequency filtering at all. Mani 2 adds a selectable 1- or 2-pole passive LF filter, centred at 15 Hz (that is, 6dB/octave or 12dB/octave roll-off.) Topology: Although both use a passive RIAA filter, Mani was capacitor-coupled, Mani 2 is DC-coupled with a DC servo. Well, unless you use the passive LF filter. But that’s your choice. Choices are good! Power supply: Mani ran with a total of 10V rails (+/-5V). Mani 2 more than triples this to 32V (+/-16V). This means way more headroom.