further thoughts on A10 vs M10 by doug, presumably talking about using the internal preamps on each unit:
The stock A10 measures better than the stock M10, this is due to the CMOS switch. The modified M10 smokes both with a more than 25dB improvement which is very significant with a signal coming in at -30dB, typical with a condenser mic recording a PA. Stock, the M10 cannot max out its A/D chip.