DW5002 vs Pearl Redline Eliminator Chain Drive vs. Pearl Redline Eliminator Belt Drive

Action of Vintage DW 5002 Single-Chain Turbo Pedal vs. New Pearl Redline Eliminator Chain Drive vs. Pearl Redline Eliminator Belt Drive. Settings for spring tension, beater length, angle, etc. adjusted to best match each others' settings. Surprising results on which is smoothest and which has most drag/friction.