Regarding the bag of MSG you spied in Nha Hang, did this bother you because you avoid MSG? Does Dong Ky not use MSG?
Regarding MSG- Once when I was managing a catering Business w/in a large Nightclub/Live Music Venue in Chicago (The infamous
China Club)- I had the good fortune to use a variety of outside Vendors-
one of whom was a lovely Vietnamese lady from the 'burbs who made THE MOST amazing "cigar" shaped rolled Eggrolls- that I really liked- so that I ordered several cases for an event.
A kid who worked there- as a Bar-back- made it his mission to route his way through my kitchen & when
I wasn't looking snatched a handful of the freshly baked morsels.
Later, I was summoned to the boss's office- in the middle of my EVENT!?
WTF???- Why?turns out, said kid had an allergy to MSG- and-
had a reaction
that constricted his airway(s) to the point of near asphyxiation-
and after 911 was called to take him to The ER- they asked me- "Why didn't you tell anyone- they had MSG""?!
After that embarrassing moment of panic- shame and guilt-
for NOT BEING BETTER INFORMED-
I have always suspected/assummed that
most Asian Cooks/Chefs do use MSG- and
I will often request it NOT to be in my food-
which I have before at not only Nha Hang and Pho 666; and I'll always get
as sideways look-

and usually some push-back as well.
Ask- any of the TOP CHEFS (no- not TV Chefs- real Chefs!) that you may (or may not) know
if they subscribe to The MSG channel-
meaning do they feel their food needs to be "enhanced" with
a chemical additive?
I'll betcha- NOT!
Point being- any "good chef" -
that cannnot assemble a decent flavor profile- honestly and authentically- without using this "secret" ingredient, isn't that good a chef- IMHO.
Nuff said.
As to "chew" versus properly cooked- and "Spam-like-pork loaf "versus real pork w/ bone and knuckle, versus,
low broth- or heavy-hand-ratio of broth-
to each his/(or her) own-
and- I'm certain that both establishments sell enough to keep em busy enough.