Diesel has a turbocharger, Hemi doesn't. CRD engine is from Mercedes-Benz, Hemi is from Mopar. Diesel models typically run a few $K over their Gasoline counterparts (I have read it's largely because the tolerances for diesel engines are higher, and tooling is more expensive).
123K miles the on the diesel vs. 90K on the Hemi, they're both about the same "age" in terms of average lifespan before a rebuild.
The diesel will probably get about 50% better fuel economy than the hemi, and has the same pulling power. Where I live the fuel cost/gallon is about the same for each.
I am biased - I drive a CRD