Platinum is always, ltf and afaik there are no major benefits other than dineout benefits if you use eazydiner for payment. Signature card is good as you get 2 free movie tickets every month but it is difficult to get it as ltf.
I have imperia banking relationship with hdfc but its not that great. I don't see any benefit except for getting free locker facility which I'm still unable to get it. Rm only calls for selling ulips or similar products.
OneCard for international spends without extra fees!
Enjoy 0% Forex Fee effective with rewards points.
1% Forex Fee- 1% Valueback = 0% Forex Fee
Pls check all T&C !!