They're two different role playing sites hosted by the same person. It's easier to make an account here, but there you have to make a thread answering questions and then get approved. Basically, Blue Moon is like a small cosy community. E is a giant. There are far more people and forums are there. Here are a few more random differences over there.
There's a policy of one bump per month there, as opposed to one per day over here.
The staff have cool titles like oracles and stuff. Everyone has some kind of title, like Lord, Lady or Leige. If you're a donor over there, you become a knight or a champion.
Posts you make in the games increases your overall post count there, unlike here.
The notification for getting a new message there, is admittedly not as cool as the beckoning envelope over here.
There's a culture of making a thread called Ons and Offs over there, which is basically a role player's general rules and preferences. We just integrate it into our request threads here.
The look and layout of the site is different.
There's no PM tracking over there.
You cannot unsubscribe from a thread you posted in. Actually, you never subscribe either. You get notifications whenever there's a new post.
And, I'm sure there'll be a lot more