I would suggest Deccan Queen 2S if available one way to experience the Dining Car and Vande Bharat the other way to experience VB.
Incase you wish to go for Vistadome, do check the position of Vistadome coach in the train you are booking. In one direction in every train, the Vistadome coach would be attached behind the engine without a good view.
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DQ has VD attached at the end in Pune - Mumbai direction without any bankers and according to me, if you want to get the best Vistadome experience, book Deccan Queen Vistadome from Pune to Mumbai.