Its your money,
The difference is around Rs 500.
It has advantage as well as disadvantage.
Advantage is you can get birds in one direction in C & Ku frequency only if available & if they are of any use to you.
Disadvantage is if you are not interested in one of the birds then you dont require a C + Ku lnb.
So first decide which bird or birds are interesting to you.
Here in the middle east like me, most people use 3 ku band universal lnb's on a single 90 cm dish to receive 3 birds namely Arabsat, Nilesat & Hotbird just an example of peoples requirements.
Just curious are you really a Bangalorean or are you from Rajastan settled in Bangalore?