In my opinion, I prefer Dakao Sandwiches over Lee Sandwiches for the following reasons:
+ shorter wait (Lee's Sandwiches can take up to 30 minutes in line plus waiting for the food - I never understood why. It's not fairly cheap and great tasting.)
+ tastes better (I usually order a combo sandwich and the meat in this sandwich tastes so much better at Dakao).
+ they sell other various vietnamese meats and foods as well. It's the fresh kind of stuff and not the packaged things.
+ buy 5, get one FREE!