On which issue did Indira Gandhi and Sanjay Gandhi always differ?

I have information from very very confidential and highly credible sources that on most occasions Indira and Sanjay Gandhi's fight started on the tea table. Indira liked white tea with ginseng and Sanjay wanted to have coffee. Indira wanted toasts to be crunchy, Sanjay wanted it light. Indira wanted normal bread, and Sanjai wanted garlic bread. Indira wanted muffins and Sanjay hated muffins. Sanjay liked donuts. They were simply different in everything they ate from cheese to butter. Indira liked white butter, but Sanjay wanted nothing but peanut butter.

I have got this confirmed from the assistant to the butler, who was a young boy in his early twenties then. I had no way to confirm from the butler as he expired in the year 1998. And their differences continued all through the main courses in lunch & dinner. Indira liked Russian salads and Sanjay liked nothing but tossed salad. Hope this would help to resolve your queries.