The J-15D and the J-15Ts here are using AL-31Fs but the one displayed on the ground at Zhuhai is equipped with WS-10s.
Yes, the one in the static display is a prototype or Batch 01 LRIP aircraft and IMO the only one so far confirmed with WS-10 whereas all flying J-15Ts are Batch 02 and are indeed again/still (?) AL-31F powered.