The 4X4's on both models sit a little higher than the FWD's, The Limited's sit higher than the Sports on each model, too. Outside of the Patriot FD II that has the most ground clearance the Compass Limited 4X4 comes in second and the Patriot Limited 4X4 comes in 3rd. This is being VERY picky tho, different tires can change that and I'm not talking about any monster tires, just common replacement. They all use different springs.
The wife and I thought that the Patriot did offer the best visibility out the front and on the rear sides but we still prefer the Compass' looks just because it wasn't quite so boxy.
The extra room in the rear is a little triangular area that's in the top rear because of roof design. I've never had a need to put anything up there
and I can load more in mine with the fold down front seat than the wife can in her Grand.