The elongated Drake moved 900 grams
There is no conclusive test that says it's an elongated or round thing.
The only difference between the two, it that the top of the bowl, extends out 1.5" more.
The lower part of the bowl is pretty much the same.
They use the same amount of water
There is no difference in the trapway.
I find a bigger difference when you raise the bowl height, or the tank height.
A tall bowl like the ADA or the Universal height will work better then standard height.
Even the Toto Drake ADA 1.28 gallon CST744 EL does 900 grams
and the Toto Drake II with 1.28 gallons does 800 grams.
Any rating of 500 grams or more is keller.
You have to divert some water for bowl rinse.
It doesn't do much good if the bowl flush is 1000 and the bowl rinse is a Zero.
You need bowl rinse.
MaP doesn't test for bowl rinse.
So even they are surprised when they install one of their toilets at home, and find that the bowl is messy.
My testing is more about both. They have to rinse, and flush.
We get many complaints abougt rinsing, and that is not even looked at by other reports.
Strange.
If women were running those tests, it would be the first thing on the list.
I used an elongated Ultimate with the 325 MaP for over a year with good success.
We did plug a few of the higher rated toilets like the Kohler Cimarron, Briggs Vacuity, American Standard pressure assist Glenwall.