I drove both recently. The 5.9 is a dog compared to the hemi. The only hemi trucks they had at the time were 2500 quad cab 4wd (heavy) and it would blow away the 5.9 1500 (light). Gas milage is supposed to be 15% better with the hemi also. The salesman kept telling me to punch it when we were driving the 5.9. I had to keep telling him it was on the floor!
I am waiting on a Hemi 1500 to come in now. It is supposed to come in on the 28th.