Fincher is a better director, I'd say only not as financially successful as Nolan. Fincher does provide a bit of social commentary and philosophical ideas with his pictures, but he is skilled enough to not undermine the thesis with constant exposition.
Nolan practically holds your hand through his pictures instead of allowing them to play out organically.
It's an insult to the intelligence of the viewer.
Or maybe it isn't.
Perhaps this explains his runaway commercial success from 2005 onward.
Says a lot about the culture we live, in my opinion.