...And you get rewarded to be a relay. What I want to know is how this is different or better to Substratum.

I like this project because it seems more transparent than Substratum. Substratum never seem to answer questions clearly, when ask how it's different from TOR with rewards or how is it not software when clearly the screenshots show software running, ie. chrome extension or native os software. These simple questions that aren't answered clearly make me suspect Substratum at the very least dishonest.