My brother claims his Dodge 1500 w/Offroad package is identical to the 2500 Heavy Duty that I am planning on buying in load capacity, towing, and everything else.. Is this accurate? Would I have to look at the weight sticker to determine this or would that reflect his smaller engine rather than actual springloads? So for a laymen, what really distingushes a 1500 as opposed to a 2500? Same frame I would assume, but anyone care to take a stab at this for a good conversation? Also, my brother fails to realize my truck has a 360CUI, while his is a 318CUI. My truck has the HD pack + HD tranny and coolers. His just has offroad pack. What you all think?