Carlyle on tile.
Needs 4 holes drilled through the tile.
Sanagloss for easier cleaning
Flush of 1.6 gpf
comes with seat
Water supply needs to be 7" to the left of center.
Aquia on tile,
bowl and tank.
Needs 6 holes drilled through the tile.
Takes a little more time for the installation.
Dual flush of 0.9 or 1.6 gpf
Saves more water, less water in bowl
seat is ordered separately
Water supply can be 3" to the left of center.
Most spec sheets mention 8" to the left of center for the water supply.