I have had an access to lounges on New Delhi Railway Station PF 1 & 16 and OLD Delhi Rly stn
Cards used - IDFC Wealth CC, AU Vetta CC
Experience -
New Delhi PF1 - best among the three, in terms of both service and food quality. Buffet system. Breakfast is the best meal. 2hr stay allowed.
New Delhi PF 16 - Buffet system, Breakfast is better than other two meals. 2hr stay allowed.
Old Delhi - No Buffet system. I was given a choice to either opt for DOSA or a Veg thali, thus only limited food available. it was part of a restaurant only, without any separate waiting area.