I don't own any EE gear but my HG quilts (0 & 20 degree) and tarps have been awesome. Very high end quality. I am sure the EE quilts are great too- hard to believe they could be 25-30% better as an extra $100.00 would indicate. Never had an issue with moisture getting to my quilts so maybe that is the difference.
I love my Hammock gear stuff. I would not pay $100 more for a EE quilt. That said after getting my Hammock gear Econo quilts I would be hard pressed for spend more for their higher end stuff. Truly impressed by these new offerings from Hammock gear. That said if I was doing a thruhike of the AP trail. I might spring for a higher down fill just for the packability.