The settings of the two dining rooms are very different, as is their focus.
Teppan Edo is a "teppan style" chinese grill. You are seated at tables for 8 surrounding the teppan grill. The chef comes and cooks at your table. The entrees are grilled meat, chicken and shrimp with vegtables, noodles and white rice. There is sushi available as an appetizer. There are 4 grill tables per soom. It is at the back of the restaurant with no views to the outside.
Tokoyo Dining features sushi and tempura entrees. The seating is at normal tables of varying sizes. There are many windows overlooking WS lagoon.
We have not eaten at Tokoyo Dining, but we eat at Teppan Edo every trip.
Enjoy