I think there are two different concepts, which one needs to differentiate, first, winner takes it all (majority voting), relative winner gets 100% of the seats, giving absolute majority to the relative winner, and the second concept is overrepresenting regions with less people over regions with a lot of people, giving more power to less dense regions. The US congress uses both concepts, two chambers, one representing the regions based on population and the other (Senate) representing the regions where every state has 2 seats regardless of the amount of people who live in the region. Weighing votes differently based on region however contradicts the one person one vote, equal vote principle.