I stand corrected -- I was told they were "finer" by somebody who demoed one and took their word for it. What about the gearing on the standards for tilt, swing, rise, fall, shift and Orbix???
I'm pondering over both options too. Getting an RM3d for a few days in a couple of weeks to test again.
As far as the m-line two is concerned, the geared mechanisms definitely have a much more solid accuracy to them compared to the f-line. The lock at zero is also more pronounced and overall it feels much more rigid to do large rise and fall movements. You will still have the same focusing concerns with it compared to the f-line though, in terms of reaching the point of focus. I think the main benefits are the much lighter weight and also more accurate focus (once you've got it) across the sensor/film with movements.