If the only choice is these two the Landrover will be roomier imo. Is a mini van not Available? Most mini vans you can fold down all but the front seats so you can literally put an air mattress in there.
These my only 2 options planing to sleep in the car since homeless but I do have a job. I actually like hard surfaces so I won't need a mattress just a blanket and pillow
I can only afford the 2 cars I posted on.
Im financing and only 2 im approved for that I can laydown in