I'm late to the party on this thread but here is my two cents worth:
Dallas and New England are tied because of how bad Dallas was in the 2000's and how good NE was during that time.
If you just looked at the draft since 2010, I think Dallas would be well out ahead of NE. Probably ahead of everyone. Since 2010 Dallas has been knocking it out of the park (for the most part) with the draft. The excellent drafting coincides pretty much with the triumvirate of Garrett, Stephen Jones, and Will McClay forming the lions share of the personnel decisions. It coincides with the team actually formulating a plan and direction for the team. Sticking with guys who love football and are good team mates. Tough guys who play the right way and play a physical brand of football.
Once those parameters were laid out, it has been much easier for the team to target specific types of players and avoid another specific type (again, for the most part).
It is to the point now where when the team takes a guy like Malik Collins or Anthony Brown... I just figure they know what they're doing and know how the player fits on the team. In the 2000's I used to get pissed because I knew the guys they were taking simply weren't the right ones.
Dallas still has misses, like every team out there... but those are getting fewer and fewer, with their great picks coming more and more regularly.
I couldn't be happier with how they do it.