Scotty can assist with the Alltrax programming. There are a lot of changes you can do with his assistance. You may want to PM him.
Make sure it is set for turf mode instead of street mode. That softens up the pedal down take off a bit.
The torque and speed curves are easy to set. If you have a laptop connected to it, you can make adjustments and try them easily.
Not sure about the PB6 vs the MCOR throttle response but it should be similar.
Good luck, these guys will help you get it right!