This time of year isn't ideal. The wheat harvest is over, but it hasn't snowed yet. Even so, the view of the terraced fields from the mountaintop is still spectacular. There are paths leading down into the terraces, and being surrounded by them is a wonderful experience. However, after seeing so many terraced fields, I feel there's not much difference between Ping'an Village and Jinkeng Village. If you're short on time, just choose one. The road to Ping'an Village is incredibly winding, so be prepared.
Next, I have to criticize the fact that while the 80 yuan entrance fee allows you to drive into the mountain, Ping'an Village also charges for parking, which is strange. The mountaintop at Jinkeng Village is full of guesthouses and restaurants, and the roadside parking lots are all occupied by various businesses. The signage is unclear, and it's confusing where to park, which is a very unpleasant experience.
Overall, for the scenery alone, it's still worth a visit.