I would like to start off by saying that both were great movies and both had flaws but I truly believe that Salt was a far greater movie then inception.
First of all inception did not have a single hot girl and Salt had one of the hottest girls to walk the face of the earth. For example.
Inception Girl
Salt Girl
Second of all Inceptions story line was far too confusing and hard to follow. Half of the movie I had no clue what was going on. During Inception I often found myself confused at the purpose of the brain surgery that they were performing. Salts story line on the other hand was action packed and full of exciting twists and turns.
Third, there was only one gun fight in all of Inception. All of Salt was filled with guns! How cool is that?
Fourth, Inception was slow and it took far to long for the characters to finally get to heaven so that they could rescue his children. Most of the first hour was not even necessary to the story line and was just artsy filler to give it a better chance at winning an Oscar.
It is hard to compare any movie to Salt because of how creative and exciting it truly was. I know that NS loves Inception so I might get some hate but if you saw Salt and have any taste in decent movies you will agree with me.