Checked out the UE website for the custom fits. If you take their exam, they ask you for your email and send you a code for:
$100 off UE 7
$200 off UE 11
$300 off UE 18+ & Live
I was looking at the UE 18+, $1120 for Universal Fit on Drop or $1199 for custom fit straight from them. I think for everything else, there's a larger difference in favor of Drop though.