Track cars and off-road vehicles are designed around different surfaces and tasks. For paved circuit use, a track-focused car prioritizes predictable response through repeated braking, cornering, and acceleration. An off-road vehicle must also cope with uneven terrain, obstacles, changing surface grip, and the clearance needed to avoid contact with the ground.
Neither category is one uniform design. This comparison concerns paved road-course cars and terrain-focused off-road vehicles; rally, rallycross, desert racing, and other mixed disciplines need their own specifications. The right choice follows the actual environment and event rather than assuming that high power or four driven wheels makes the two types interchangeable.