Are you interested in how Cardano PoS is different from Bitcoin PoW? There are many significant differences and both projects are different advantages and disadvantages. Let's compare them from energy-efficiency side.
|Consumption per device||45W|
|Estimated Bitcoin yearly consumption||253,300 GWh|
|Estimated unique devices *||508|
|Estimated yearly consumption||0.200 GWh|
|Cardano versus Bitcoin efficiency||1,266,501x|
* Based on our live relay analysis. Some pools have 5 relays, others share some relays together, others run multiple pools on a single device, some have more relays under one DNS name etc. Some run failover infrastructure, some have non-public relays. We have tried to factor in an appropriate average of all of these. Our estimation includes all infrastructure - relays, block producers etc.