Not sure what Dodge has done with the Hemi's.
My dad had an '06 1500 with the 5.7, and it was a dog.
That one got totaled, and he ended up with an '09 2500 with the 5.7.
Both trucks were 4x4, crew cab, short box.
But the '09 has more than enough snort! There isn't even a fair comparison to make between the two. The '06 felt like it had a slant 6 six in it, while the '09 breaths fire!
Neither truck had been 'tuned' or messed with, all stock.
Both trucks average about the same mileage, with the 3/4T doing a bit better when towing.