Thanks for the input guys, sounds like everyone thinks with the similar specs they should perform similarly. I thought maybe conventional woofers with more throw might have more punch than electrostatics or some other explanation like that.
I'll try moving the Maggie's around the room a bit to see if I can get more bass out of them, but it's such a big difference I doubt I'll be able to. I'll try to take some measurements this weekend and post them.
I'm using a Levinson 433 amp rated at 400wpc at 4 ohms which should have plenty of power, right? =)