Toto makes a 10" round in the CST703.10, but it's pretty basic.
The Cadet 3 10" is a bit nicer.
The other TOTO 10" options are elongated.
The 1.6 will have more rinse water, but not much more.
I always suggest that if you can get the rebate, go for the 1.28
Noise will be pretty similar.