Ive been talking around, and one thing I have heard is the fleet or chassis cab trucks are getting a single stage turbo. Some other small differences, and Im also hearing from people that have these trucks that they are not happy. Way different from what Im hearing from individuals that buy them for personal use.
I had also seen something similar in the Dodge/Sterling trucks, where the personal use type trucks seemed to have WAY more power. Not sure why, maybe the thought is that fleet trucks get the hell beat out of them and they are trying to make them last. Or, cheaper. Ive always heard that for the same engine, passenger vehicles and trucks always had different parts and power ratings. Looks the same up the food chain too.