Well, there is more data ... email (email was always null with GetMembersBySession in DistrictAddress), occupation, birthday, committee, staff, cell phone, religion, district and capital address, etc.

Here's a sample output for comparison. http://pastebin.com/LYN2h0n5 (more) vs. http://pastebin.com/4KGBviVq (less)

Since we're passing in a guid from GetMembersBySession(sid)['MemberListing'] it returns member info just like any other session.