Looking at the numbers here, their 360 days esc warranty still by far exceeds the typical 120 days (which is like 1/3 of a year at best offered by most manufactures for their esc. Also most put out their motors for 90-120 days warranty, and their 180 days exceeds that as well.
In addition, nothing wrong with putting different time warranty frames on two entirely different types of products, i.e. either esc or motor. A pc interface device could have a different warranty frame. It's totally up to the company to decide this on their end. Their warranty exceeds the norm in both cases by far.