I understand how Bitcoin works and I believe that on decentralization, things can be improved. Big Bitcoin mines on the planet are few, and relatively vulnerable, being linked to a particular location. If Cardano succeeds in starting the PoS, in the first stage there will be approx. 1000 pools. Moreover, each ADA in each holder's wallet will put the shoulder to secure the network. In my opinion, Cardano will have better decentralization, implicitly security. Then there is efficiency and, of course, real utility, I refer to the smart-contract infrastructure.