Since my 98 Volvo wagon is much older than the newer models you're looking at, I'll comment about wagon vs suv.
I'm surprised at just how little room is inside on many suvs. Not all of course, but many. It's like a small interior vehicle cloaked in a large exterior. Big doors, big tires, big sheetmetal and mouldings. Which adds up to big(er) weight. Further, it takes more power to get it all moving...and stop it.
Then there's a very large frontal area being pushed into air. Aerodynamic drag goes up with the square of velocity. All that massive frontal area adds up to A LOT of aero drag, that takes HP and $$$ to move against that drag.
My wagon doesn't look very big, but there is a lot of interior room. Plus there is a roof rack on top for more if need be. I can haul 4' x 8' sheets of plywood, bicycles and a kayak up top. Plus I can easily reach it, unlike many suvs. It does sit very low to the ground and has a rather small frontal area.
The sled is also very comfortable to drive and doesn't kick you around, especially your head. It has a long wheelbase and sits low. Compare this to a higher vehicle, with a shorter wheelbase, where you're sitting much higher. Your head can get kicked around a bit. I really notice the difference in my brother's toyota mini-van and his ford explorer over rough pavement, making turns and lane changes: I'm constantly getting "kicked" around, moved side to side, having my head josseled (sp?) about. Makes it hard to relax when you keep getting aggitated. Of course, they're used to it but I'm not. Very different geometries.
Finally, I never have to worry if I need to make an emergency maneuver, like a sharp swerve. The sled handles very well and it'd never roll over or become unstable where I would lose control. It doesn't have traction nor stability control either. Doesn't need it. I'm very, very leery of any vehicle that needs an electronic stability control to overcome inherent mechanical instability.
We used to hear about roll-overs quite a lot 10-15 years ago. Remember what happened when some of the suv's experienced a blow-out at 70mph? Very bad results. They became very unstable and rolled over. Perhaps every car today has to have a mandatory stability control system, I don't know. But I don't even think twice if I need to swerve...and swerve hard to avoid a potential collision.
Being low to the ground has its inherent advantages!