In which ways is Earthcoin different from Bitcoin?
As mentioned in the BitcoinTalk thread.


  Our goal isn't to compete, as much as compliment, create balance, and 
  not divert into launching 9 more coins because we can.


It doesn't look there is much difference. It may have a different block time, reward, and cap, but that is standard stuff to change for an altcoin. There appears to be absolutely no technological advance. It donates a percentage of coins to charity but that means nothing if it has no value.