Thanks. I wish the website did go into those details. Give the details on the 'Eco' page, then on the standard page say "All the features of the Eco, but including..." and on the Max "All the features of the standard model, but including..."
Looks like I'm going to go for the standard model, as I don't plan on hooking up a keybord to it after, and if I do, well, I can just plug one in. No biggie.