A very good choice if I do say so myself haha.
Anyways, I wouldn't say that either of them is "better". Who am I kidding? I would, (you're not getting an answer for that though...), but overall, I think that both are the best in their own ways. In the end, they're so different that I don't think that comparing them in that way would get really accurate results. Both are awesome for what they are. Depends on your preference.
Anyways, here's kind of what's in either role-plays as your interests and tastes are unique and may differ from others:
Darker, more complex storylines tied together to make a story about the lives of Aetherlight players here before they zapped into Engine Bay. Can be described as a thriller or teen novel. You can join here.
The Elderfun Chronicles
More adventurous, and made in a more "Aetherlight-y" feel. Can be confusing occasionally, (that goes for both role-plays actually), but is a good read for anyone. Can be described as an adventure book.