In a total way, IAF has the superiority. Let me put their concern in this way: the superiority of IAF in last decade and half is at the lowest at this moment. They are superior, yes. They will increase this superiority with programs they are running, yes. But concern is for the moment. Situation is created by dwindling aircraft numbers while replacements have not been on time. MMRCA has also taken way too long to finalise. Frustration of IAF chief was evident with his statement "this is not my air force, this is Indian air force!", if you can recall.
Those who consider F16 inferior, yes it is in some departments when compared to SU-30 but it has few tricks up it sleeves. In some areas it outperforms them. (hint: SU30 can take on any role with perfection right? Why go for MMRCA? It does not make logistical, economic, crew training and operational sense. Only makes political sense.)
P.S. "Finding is reserved for those who search"