so I brought a 2018 jaguar XE S and I found a body shop parting out a 2017 XE RS I want to know if the headlamps hood and radiator were all the same

 

The hood is a yes. The radiator should be a yes as long as they are both 3.0 v6 engines (I am not sure if there is a difference for AWD vs RW,D but don't think so). The headlights is another matter. There are a few types: BI-XENON. with adaptive lamp, Bi-xenon, without adaptive lamp, and Halogen. My R-Sport has the Bi-Xenon with the adaptive lamp, but I do not know if they all do and I do not know what you have...