That's the trade-off. An Escape (CR-V, Rav4, Rogue, Equinox) will be narrower and less comfortable for passengers, but potentially have more cargo stacking room. Sedans in the Malibu (Fusion, Accord, Camry, Altima) class are usually wider and have more legroom in the back.
Of course, your
Budget experience could be like ours a few weeks back. Saturday night. Half-hour+ line at the counter to get your car. Out of our "full size car" reservation. Being told "you can get this for $8 more per day" over and over, held firm on paying no more than we booked at. Ended up with a Jeep Grand Cherokee for "full size car" price. Used a little more gas for the week (still only spend $40), but lucked into a much more comfortable vehicle.
Don't make the mistake that other people in line with us made. One of the "alternatives" we were offered was a Mazda CX-3 "SUV." Hah. We knew enough to say no, as it's a small, glorified hatchback. When we were loading our Jeep, a group of 3 people (all adults) walked up to the CX-3 parked next to it, and they bursted out laughing. They had no idea how small it was. ...This is probably mainly a Saturday night, low inventory problem with Budget, but the long lines have happened to me twice now. What takes time is the staff at the counter having to look up cars to assign to people; despite us all having made reservations, no one's car seems to be preassigned to them. It's a free-for-all on anything available.
Also (semi-off-topic) both of my Budget rentals have had tire trouble. The first one had a slow leak that needed air top-off, on top of a bulge in the sidewall. The Jeep had bald rear tires, and was rental-spec rear-wheel-drive so if you didn't check you might get a bit of a surprise driving in the rain. On top of that, the Jeep was overdue for an oil change. Basically, Budget doesn't maintain their fleet, so be careful when picking up your vehicle to look for any potential safety issues.