They opened a Taco Bell in Shanghai! In Pudong! As a student of all things bell, I felt obliged to try it.
Main thing that was different from Taco Bell in the U.S.: booze.
Main thing that was the same as Taco Bell in the U.S.: they screwed up my order. 
I had ordered a margarita and two hardshell beef tacos. On their first try, I received a mojito and two soft chicken tacos. Silver-lining: I got to learn that the Chinese word for “crunchy” is 脆 (cuì).
The reliance on goopy, nacho-style cheese instead of grated cheese made everything borderline inedible and didn’t taste at all like what I’ve come to expect from the fine people at Taco Bell. Although the mojito was decent (if weak), the margarita (also weak) was blueish and had a distinct chemically taste to it. I noticed that although the English menu said “margarita”, the Chinese menu had listed it as “blue sea witch” or something, so I’m not even sure they know what it is.