It has special fasteners that keep it locked tightly together at the joints, a feature that barbed wire does not have. In comparing price tags, game proof fencing is much more expensive than barbed wire fencing and also more expensive to install. Barbed wire fencing is the most traditional barrier for preventing roadkill. You see then strung up along country roads all across the nation. Regular barbed wire is only 4 ft high.
Small animals crawl through it and larger animals like deer jump right over it.
A deer can jump a 7 ft fence from a standing position. The barbed wire does little to help. However, it is cheap. This is certainlyt a plus. Maybe it just depends on where your priorities are, preventing roadkill or saving a buck.