Seton health insurance

I just started at Seton this week, and I'm trying to figure out which health care plan to choose. I can't figure out the difference between the Seton basic EPN vs. Expanded EPN plan.. and noone seems to be able to give me a straight answer! It seems to me that the major difference is that Expanded has more providers and it's more expensive. My husband and my baby are also going to be on the plan... so which is better for a family? Or does it matter? Anyone have any experience with this??