The 2006 xB is the "little box." It's the top car here:
The newer model is pictured on the bottom. From this review of the newer model: "Only one engine is offered for the 2008 Scion xB, a 2.4-liter 158 horsepower in-line four cylinder. With more power, the xB has unfortunately lost some fuel efficiency. The EPA rates the xB at 22 miles per gallon in the city and 28 mpg on the highway. Weight has increased by about 600 pounds which does not help its fuel economy." The little box's engine is 1.5 liters, 103 horsepower. Both are front-wheel drive. I think traction control is standard in the newer model; not sure about the 2006 (but it is available). Perhaps the bigger engine in the newer one would be better for mountain roads. Steep hills are okay in the older one, but you end up slowing down noticeably.
Re: Scion, and cruise control
The newer model is pictured on the bottom. From this review of the newer model: "Only one engine is offered for the 2008 Scion xB, a 2.4-liter 158 horsepower in-line four cylinder. With more power, the xB has unfortunately lost some fuel efficiency. The EPA rates the xB at 22 miles per gallon in the city and 28 mpg on the highway. Weight has increased by about 600 pounds which does not help its fuel economy." The little box's engine is 1.5 liters, 103 horsepower. Both are front-wheel drive. I think traction control is standard in the newer model; not sure about the 2006 (but it is available). Perhaps the bigger engine in the newer one would be better for mountain roads. Steep hills are okay in the older one, but you end up slowing down noticeably.