How does this differ from p2pool which has existed since 2013?
AS I understand they offer a software which will help you to have a "exchange" coin. Am I right?
Yes. You can exchange your DMine Tokens that we give you for whatever coin that you were mining (Bitcoin, Litecoin, Monero, etc). We do not force you to hold onto your DMine Tokens, they can be exchanged right when you earn them and cashed out as you please.