In Ethereum only "validators" validate transactions - those with more than 32 Eth in their own wallet.
In Nano "representatives" validate transactions - but individual users vote a representative to represent them (with their wallet balance as a weighting).
The difference is that you can have 0.00001 Nano and still have a say over the network. It also removes the need for "stake pools" where lots of people lend Eth to one person to make up 32 Eth together (with the hope you will get your money back).
Your voting power is weighted by your balance, so those with higher balances have more voting power, and the representatives with the highest amount voted onto them have the highest amount of control over the network.
In Ethereum only "validators" validate transactions - those with more than 32 Eth in their own wallet.
In Nano "representatives" validate transactions - but individual users vote a representative to represent them (with their wallet balance as a weighting).
The difference is that you can have 0.00001 Nano and still have a say over the network. It also removes the need for "stake pools" where lots of people lend Eth to one person to make up 32 Eth together (with the hope you will get your money back).
[1]: https://nano.org