The MF-104M uses the same bucket brigade chips that have been used in the MF-104 and thereby gets sonically confusingly similar to its idol. The maximum time of the marvelous delays stays at 800ms.
In contrast to the MF-104, which only allows a modulation via voltage control, the Moogerfooger MF-104M offers a modulation completely without any special tricks. Nevertheless, the 9V-pedal also provides control voltage.
The mono colossus dispenses with true bypass, but you will get Tap Tempo, an expression-pedal input and even midi.
Unfortunately, the production of this cutie has also been stopped and for it is quite popular as well, thus the prices are correspondingly high.
I also like the Moog Moogerfooger MF-104M a lot, thus it gets 8 of 10 points on my cult-factor scale.