Feel free to correct me:
First flight in J15 programme in 2009.
During 10 years after that
the following planes flew for sure:
7 prototypes (did all seven really fly?)
24 planes in two batches
1 or more two seat prototype
1 or more EW variant prototype
1 or more catapult prototype
1 or more serial two seater (this one is perhaps not so for sure)
Roughly 35 planes. But hard to tell precisely because ther may have been some attrition replacements and the two seaters are next to impossible to track. Not to mention the possible 3rd batch.
Highest number of crashes I read about is 4. Four crashes for 35 airframes in 10 years.
Now we don't know the actual number of flights, which is an important variable. So we can only assume number of flights per plane is similar to other programs.
F-14 stats are pretty clear according to this:
From 1970 to 1979, the following F14 were produced:
12 prototypes and pre-serials
427 batch production planes.
During the same period, 39 different F14s crashed. 11.25 airframes produced per one crashed airframe during the first decade.
For J15, assuming four crashes, it would be: 8.75 airframes produced per one crashed airframe.
We have too little info to make this stastistic meaningful. But taking it face value, J15 programe is slightly more crashing than F-14, though not by a meaningful degree, in my opinion.