Ford Explorer or Ford Expedition

Dear community of forums, I drive a Ford Explorer with joy and passion, which is slowly getting a bit old. At the moment, I am thinking about swapping the old Explorer for a newer one and accidentally stumbled over the expedition during my search. Since I do not know this real, but only from the net, I have a few questions. a. Is the loading area (case space) significantly larger than the Explorer? b. Does the passenger cell have even more space for the occupants? c. W he is about the additional costs of the 5.4 L V8 compared to the 4.0L V6? But how much does that matter? Are there any comparison values (consumption per 100km) or experiences of forum members? Are there any other comments, what I should know about the difference Explorer / Expedition and perhaps have overlooked in the net? Thank you, best regards Stefan