The thing is that the North Eastern militants might be better organized , but they still don’t have the same level of training as paki mujahids nor experience. Also not entirely sold in the china part. Maj Gen bakshi himself considers NE to be a insurgency while J and K from phase 97-03 to have been a proxy war.
Do remember in the early90s all the way till mid to even late 00s many of the paki terrorists had expereince fighting in Soviet Afghan war, they were directly funded and trained by one of the largest insurgencies.
However, I can say that north eastern militants have managed to get KIA of ours in double digits at least three times since 1980 (1982 ambush on sikh regiment, 1994 ambush on 16 maratha LI, 2015 ambush), but then again, historically North Eastern miltiants often surrendered in large groups when defeat was eminent.