The SS114 is not the recommended toilet seat for the Aquia toilet, but that doesn't mean that it won't fit! In fact, all elongated Toto seats fit all elongated Toto toilets. The same is true of the round seats and toilets.
The toilet seat that Toto recommends for the Aquia is the SS204, and that's always what is pictured with the Aquia. Both would work, and they function the same, but Toto believes the style of the SS204 looks better with the Aquia than the SS114.