As a comparison a Trek Domane Alr5 is an aluminium road bike and weighs 10.05kg, my Ribble Endurance SLe Pro weighs 11.5 kg (Ebikemotion) and the Boardman Advance 8.9e weighs 15.5 kg (Fazua)
Without the battery my Ribble Endurance Sle rides like the Trek Domane. My least favourite would be the Fazua system bike without a battery.
Whereas if you aren’t riding very far and the Fazua battery lasts the the 60 n/m vs 40 n/m gives 33% more power.