Look closely at the two models since there's a chance the motors are identical (maybe the controllers differ). The lower price is fair especially with the Walmart guarantee. If you decide to buty I would "ride it hard and put it away wet" in the warranty period. Many electrical problems are "infant mortality" and if they don't occur in the first month or so, you'll be OK for a long time. Just don't overheat the motor riding up hills. Rule of thumb is don't let the speed go below half of top speed for any length of time (few seconds IMO).