Correct.
The only round bowl with CEFIONTECT is the C423EG bowl of the Promenade.
That can take either the ST424E or ST424S tank.
For the other bowls with CEFIONTECT, you can get the elongated versions of the Drake, The Drake II, Ultramax and Ultramax II. The letter that signifies CEFIONTECT is "G"
If there is no G in the model number, then it doesn't have CEFIONTECT.
I think the reason that round bowls don't normally come with CEFIONTECT is cost.
A lot of my customers that buy round bowls will reuse their old dirty round seats. And if they buy a seat, most get the cheapest thing they can find.
On the other hand, most elongated bowl sales, the customers will go with the nice slow closing Toto seats.
That's what I'm seeing at least.