I'm a few years late to the party, but as I currently own both the M2 and F3 I wanted to record my thoughts for posterity. Hooked up to Zu Defhead speakers with a Manley Shrimp preamp, I favored the M2. The difference between the two amps was not huge to my ears, but I thought the M2 was a little more lit up in the upper range, like a good tube amp (which I also compared with). The F3 sounded slightly darker, more veiled. M2 had a little more pinpoint imaging.
First Watt M2 versus F3
I've read reviews which claim the F3 is warmer than the F5 and the M2 is stated as warmer than its cousin amplifiers, presumably the J2.
How would the M2 and F3 compare?
How would the M2 and F3 compare?