Time for a Pro/Con list
Pro for SnowRacer:
Rope can be tied to sled, so changes in direction don't yank out arm sockets (like wookies) during changes in direction
Sledder has limited steering, enabling following a different track (GIANT JUMPS AT SPEED)
Con for SnowRacer:
Rope can be tied to sled, meaning changes in direction >90 degrees off of direction of travel WILL toss the sled. Violently.
Rope is of finite length, meaning malicious snowmachiners can stop greater than rope length from jump, but less than rope length from landing point. (this can hurt, for the sledder, and be endlessly hilarious for snowmachiner.)