Firstly HDFC does not let you hold two credit cards at the same time. There are a few exceptions for HNI customers but it's pretty one-off.

Secondly, the Citi Prestige card is pretty hard to obtain, income criteria is around 40L/year.

@ OP - I'd suggest you try and score the Jet HDFC Diners card, but that's also pretty difficult to get if you're just starting out and this is your first credit card. Else just get Jet HDFC World/Plat cards and build up your credit limit and eligibility.