Right now, there isn't anything that distinguishes species from one another aside from EP, which is evident upon starting a game and glancing at your homeworld. Eventually though, galaxy setup will probably be split into multiple steps, with choosing (or customizing, as the case may be) your species being its own step, which will make it a lot easier to describe the differences between species in an easily readable way. Putting this information into the Quick Play guide would be appreciated though.
Here is where I have a problem. It doesn't matter that "there isn't anything that distinguishes species from one another aside from EP" - someone decided to create multiple races and put the ability to choose between them in the code. The fact that all of the races are identical is irrelevant. If you add the ability to have multiple races, then you need to add an "information box that gives a brief blurb about that species" - even if the information presented in that box is currently the same for each species.
Also, "glancing at your homeworld" gives you an implied piece of information - which is sufficient for people who know all about the game. When you write a game, you should write it from the perspective of people who are interested in the topic, but know nothing about the game itself. The beginning player should always be assumed to be a "Beginning Player" - who won't know diddly about EP.
Think about it this way. Your brother/sister/friend loves Science Fiction but knows nothing about the game that you are designing. You sit them in front of the computer and say, "Play". What do they need in order to hook their interest within the first few minutes instead of having them say "I don't get it", then get up and walk away?