The Drake and the Ultramax have ADA versions, you will find the letter "L" in the model number, which means the bowl is 16-1/2" tall
Drake CST744SL, CST744EL
Ultramax MS854114SL, MS854114EL, MS8/54114ELG
The othe Toto models that use the Letter "F" means the bowl is 16-1/8" high.
The Drake II, Vespin II, Carlyle II and the Ultramax II are F bowls at 16-1/8"
Drake II CST454CEFG
Vespin II CST474CEFG
Carlyle II MS614164CEFG
Ultramax II MS604164CEFG