Extrusion diff between part printed withe Marlin, and one printed by klipper

Be sure to follow calibrating-rotation_distance-on-extruders

My personal procedure:

  1. Remove the nozzle
  2. Extrude 50mm of filament
  3. Cut the filament at the heat block with an accurate side cutter
  4. Measure the cut off filament
  5. Calculate new rotation as per above link
  6. Repeat from No. 2 to verify

Edit: Make sure to disable all additional extrusion modifiers (like in Octoprint) before doing the calibration.