Yes, I observed that there seem to be custom speed tables in the files, and, to me, they seem goofy, it takes a lot of throttle to get moving, but the upper throttle range seems to be very “compressed”.
But it should be the same in each direction, so do this: set momentum to zero (CV3 and CV4 to zero) and see if that changes it. The momentum is one of the few things that can be different with direction.
Typically, people will set the deceleration HALF of the acceleration… the reasoning is that people get in more trouble stopping in time as opposed to getting up to speed.
Let me know if this does the trick. If so, set the momentum the same in both directions. NOTE WELL: the momentum setting has a LOT to do with how the sound works, this is spelled out in many places in the documentation.
So if you run with zero momentum, you will not hear the effects of the “load sensitive sound” as much.
Greg