I saw no similarities. I think this is a stretch and you're just seeing archetypes.
I think Peter is right here. When I saw the movie I was thinking some about Mistborn: Final Empire but what I was really seeing was the similarities that came about because of a shared genre, the heist film. So it wasn't that Arthur(Inception) reminded me of Dox, it was really that both were based on the idea that an eclectic group of thieves would need someone responsible to handle things like renting a warehouse. So we noticed the character archetypes that were present in both movies.
In reality Vin and Ariadne have very little in common other then they are a new comer to the group/lifestyle. Also I think Ellen Page should play both, but I digress.