The offers provided on RSDC are worth more than Rupay Platinum. For general comparison, RSDC provides annual benefits easily worth more than 18K compared to Rupay Platinum around 7K.
Considering the fees both the cards provide way more benefits than the AF. So, it depends on the person which card will be beneficial for you based on your needs. An average person always tries to recover the AF first after that everything is a bonus.
Recently
@Anupama_Jha claimed the offer, and he had a very bad experience. Many DCs provide the same BMS offer every month but it is very hard to get tickets using the offer. Better use CC for BMS or Tide card offers same every month and tickets are easily available using the card.