The Gwyneth is a taller bowl, 16-1/8"
That's part of the price difference.
It depends on what that is worth to you.
I sell the ADA Ultramax for $95 more than the elongated Ultramax.
The Gwyneth Comfort Height is $75 more.
Ultramax elongated, 14-5/8" high bowl
Gwyneth Universal Height 16-1/8" high bowl
Ultramax ADA elongated, 16-1/2" high bowl.