The Niagara has a plastic tray that you tip to create a flush.
It's a basic builder grade toilet are far as quality goes.
The footprint is fairly small, so if you have a wood floor, the old outline is likely to show.
The Toto Unifit adapter, as many will tell you, works well for moving the rough-in.
I sell toilets that use the Unifit day in and day out.
I stock about six of the 10" kits and two of the 14".
The toilets come standard with the 12" kit.
It's the best choice if you have a 10" or 14", everything else looks contrived.
Using these, allows the bowl to have a cleaner look and makes it easier to clean.
If you ask women which one they would rather clean, any Toto with a Unifit will be getting the two sponges up sign.
We sell and install thousands of toilets every year, toilets with the Unifit have been big sellers for us.
If your plumber hasn't see them before, or has a hard time reading, then have him give me a call.
The Toto Guinevere will set in the same spot using either the supplied 12" Unifit
or the 10" and 14" Unifit depending on where the rough-in is plumbed.
One toilet, three choices.
Other toilets that work with 10" are
Cadet 3 with 10" tank
For Seattle, Anchorage, Spokane