The MaP gram rating for the Hamilton is 150
The Map gram rating for the Ultramax is 700
Here's what one of my customer's did,
His first replacement toilet was an Ultramax with Sanagloss.
His next two were Hamiltons. (not a good idea) I don't know who installed those.
He then called me up and had me pull out the Hamiltons and replace them with Ultramax's.
We put the Hamiltons on the curb for the homeowner with the hope that someone would pick them up and reuse them. They were fairly new.
Toto does make the Plymouth, comfort height, 28" long with a 675 gram rating.