Years ago someone posted side-by-side pics of three HD diesel engines comparing some of the internal hard parts to prove just how heavy duty the Cummins motor was built when compared to the others which were a Duramax and a Powerchoke. I'd like to know if anyone can tell me/us with knowledge of certainty, that other than the obvious displacement enlargement, what else separates the two 2014 and 2015 Cummins motors from one another? I guess I should also add in there that one will have emissions by way of an EGR and a DPF to scrub out the particulate debris left over from the ultra efficient diesel motors made today. I guess my "want to know" stems from: did Cummins start going cheap inside the motor with the hard parts? Is a Aisin/Cummins combo really designed to last well into the 400,000 mile length of serviceability as earlier trucks have been known to pass and surpass with relative ease. If someone could point me in the correct direction I'd greatly appreciate/.....XCheers Joe