Imagine if there was a restaurant named "Better Beef Burritos." In this hypothetical bodega, they offer a somewhat limited menu featuring the following:
Ground beef burrito
Shredded beef burrito
Steak burrito
Lengua burrito
They also have a few other dishes with comparable taste profiles and similar ingredients, including quesadillas, tacos, a burrito bowl, and a burrito salad.
Now imagine trying one of their burritos, only to find yourself comparing that burrito to every other burrito you have ever eaten. Through this process you determine that the burrito bought at Better Beef Burritos is superior to all the other burritos you have had.
That's kind of how this is. This place is a one-trick pony, but it's a pretty good trick - you'll probably be disappointed at the next dog and pony show, and want to go back to Superior Pho.
In fact, I would say this place is Pho-Nominal!
(That's a pun that works on multiple levels - I counted at least four)