Jeep Grand Cherokee 3.0 CRD or 3.6i (from BJ 2016 Facelift)?

Good evening, I drove an SRT8 in February which really went off like a zäpfle . But it sucks me too much . Now I am thinking about whether I should try a 3.0 CRD (diesel) and/or 3.6i (petrol) . Equipment from Overland, better Summit . First question about the 3.0 CRD: How does this motor behave in short distance ? The question therefore, because I have only 9km to work . Or would that not cause any problems . Is the engine generally recommended ? Then to the 3.6i (V6 petrol): The short distances Question I don’t need to ask here just gasoline. Is this engine recommended as a gasoline engine or too weak-breasted? Which engine would you rather recommend to me apart from the SRT (drys too much) to be comfortable but also some splashes on the road? What should I also pay attention to with a used from BJ 2016 Facelift, any serious childhood diseases that could go into the money? That’s it for the first time. Thanks in advance.