Best lugging engine

[Running rough]

Cats have always been known to have better lugging ability then cummins or detroits, with that I mean most guys that run them figured they had better low end grunt then the latter 2, however in recent years detroits and cummins have somewhat figured out how to make thier engines pull better down low, what do you guys think? Is cat still the undisputed champion of low end torque or have the competitors finally caught up, lol keep in mind we are talking stock hp and torque levels here,