Ok... I am making this post with very little bias for eithe side.
I worked in a truck shop for the good part of a year and as far a reliability stock vs. stock I saw countless dodges with injection problems and overheating problems. In complete honesty I do think that ford has dodge beat as far as reliability. The only ford that really had a problem was one 6.0 with blown head gaskets. On the subject of duramax i only remember was one that came in and it was towed in because hey decided to run it with no coolant.
keep in mind this is a truck shop that has room for almost 20 trucks and almost every single bay was filled with dodges and most of the lot was full as well. Yes most of the problems were small but either way they were in the shop and not out on the road doing what they are intended for.
And for those of you who want to say that im just bashing on dodges because im a ford guy that is not true. I really do like dodges and almost bought an 06' megacab dually 4x4 6spd but i got my black ruck for a hell of a lot cheeper and it was overall a bette deal.