Gevo Tug-O-War - Intermountain vs. Athearn Genesis

Which locomotive has more pulling power? Intermountain ES44AC CP 8701 Athearn Genesis ES44AC CP8711 Both came DCC equipped from with Soundtraxx Tsunami decoders from the factory. For the record: Intermountain ES44AC = 520 grams / 18.34 oz Athearn Genesis ES44AC = 581 grams / 20.49 oz Full review and pull test of each of these locomotives is located here:    • HO Scale Locomotive Reviews & Tests