I was noticing that the P4 was starting at a slower pace when I pressed the right stick all the way up, than if I pressed it backwards.  Is this by design?

I completed a complete calibration last night, and I adjusted the EXP settings to different settings from 0.4 to 0.7 and there was no change.

The initial angle of the P4 when it starts going backwards shifts down about 30 degrees and it starts accelerating fast; but going forward, it does not accelerate the same way a nd it stays almost level.

Is this a defect or normal?

If you turn off object  avoidance, does that change things?