It takes a special kind of useless to pit Amul & Nandini against each other for political gain
Are they so down in the dumps that they cannot find any other issue?
Just for your history, in 1965, after being impressed with Amul, LBS asked Dr Kurien, to replicate it nationally.

This resulted in the formation of NDDB and the commencement of Operation Flood.
It was under its Aegis, that Nandini was formed in 1974.
Nandini is inspired from Amul. And Nandini's success is in a way, Amul's success.
And some idiots are pitting one against the other.

Go ask people who work for Nandini, and they will be happy to say that they have learnt a lot of things from Amul
And Amul too has learnt a lot from Nandini
In many markets, Amul and Nandini co-exist without any bitter rancor.
But some random people want to create differences.