The Aquia I, has the larger trapway.
The II and the III use the internal trapway and only a flange adapter at the floor.
500 grams is fine, most feel that anything over 500 is overkill anyway.
I downloaded a chart from San Francisco Public Utilities (SFPUC) and they have listed the Aquia EL with an 800 MaP score and they have the Aquia EL II and III listed with a 500 MaP score.
My questions is what is the difference between the Aquia and the Aquia II that would change the score so much?
Is the Aquia more effecient than the II?
I'm one of those guys who try to get the most bang for their buck. so to speak.
I was concerned about the MaP numbers. I you say 500 is fine then I'll trust that. I suppose anything will be better than my old 3.6g toilet.
I never would have thought that I'd be so excited about getting a toilet. I guess it shows my age or it shows what I put a premium value on. LOL.