Go and check MMT website you will find all extra benefits.
on Monday normal ICICI CC gives you 12% discount upto 1800 on Flights whereas ICICI MMT card gives you 15% discount upto 2000; Apart from it you will also earn 1.25 my cash for every 200/- in flight booking and 4 my cash for every 200/- in hotel/holiday booking.
on paying 2500 you will get:
- Get 1,500 My Cash
- MakeMyTrip Holiday voucher worth ₹2,500
- Complimentary membership of MMTBLACK - Exclusive tier
Apart from this check out this link for all offer of
ICICI MMT offers
Final verdict: It's depends on you that a credit card is benefical for you or not!