I've been to both but am not sure I have a clear distinction between the two in my mind. Any other Hounds with more experience or opinion in this regard? It's a business lunch, but more of an informal one so as long as service is adequate that would be fine.
If it's Sushiden, is there a preference between the E 49th and W 49th locations? Both are equally convenient for me.
Finally, is Sushiann slightly pricier?