J10C WS-10B is a thrust vectoring engine as well
No, it is not.
The only TVC J-10 was a one of J-10B prototype
Only one J-10B prototype utilized the WS-10B engine.
Quite a few J-10B’s have been retrofitted with WS-10 engines. As which model it is 10A? 10B? No idea


Even the J-10S has WS-10’s these days
The J-10B No.1035 prototype was the first J-10 to use the WS-10 engine, though subsequent production models all adopted the AL-31FN until WS-10 saw widespread use in late production batches of the J-10C; notably, Prototype No.1034 originally equipped with the AL-31FN was later converted into the J-10B-TVC demonstrator.
Yeah i get that the initial J-10B’s primarily used the AL-31 and most still do.
Correct me if I’m wrong but the J-10B was mostly a stop gap production because the new radar and WS-10 was not operational ready yet hence why so few B’s were made compared to the A and C
That’s true.