It would be unwise to try to compare Indian and Chinese SLBM's on this forum. China has been in the SLBM arena for decades, India on the other hand doesn't even have an operational ICBM as of today, and its nearest planned SLBM will have a miniscule range of 700km. Such a discussion would just turn into a flame thread, with unsettled indian members throwing fits and insults instead of facing the fact that their very far behind in ICBM tech when compared to China.
PS. LethalForce, China's first SLBM undersea launch test was almost 30 years ago, 4 years ie 2008 for the K4 is child's play. And no, you dont just increase range willy-nilly, India doesnt have the cryogenic rocket technology necessary for the JL2's truly ICBM capability. Dont argue, its true.