We have eaten at both and enjoy them both.
Teppan Edo is a great restaurant, and we enjoy it a lot. We appreciate that they serve authentic white rice, and not chinese fried rice, but many here hate that. We also enjoy sitting with other diners. The food is delicious, the service warm and friendly and the chef's entertaining.
Tokoyo Dining is quieter and more refined. Again, the service was outstanding and the food was very good. We very much enjoyed our dinner, but I think I prefer Teppan Edo
Have fun