The basics on the modern diesel motor, with high compression, and boost, have turned an engine that was intended for low RPM and torque, into a performance engine. The drawbacks here is that the components needed to handle the substantial torque, (corresponding HP) are very heavy and large. By default, the RPM capability is limited.
What else are you looking for? I do recall one of the diesel magazines taking similar 1994-1997 F250, and adding HP to both, gas and diesel. Their limits were budget based, and the diesel responsed with more "performance" then the gas for the money. However, performance is different for everyone, do you like seat pinning torque, or high RPM pull?