b4 you go in for either of the two let me convey our experience....
We approached the Reliance guys for the USB Modem on phone and purchased two USB Modem -HUAWEI - MODEL : EC325. We have this Reliance Data Cards also. But we never receive the Bills and after 4-5 months suddenly the services are stopped and when we contact the reply is -'Bill not Paid" But where is the Bill???
Now starts the marathon hunting for the bill. The guys whom you approached for purchase will not respond to your calls. Customer care will say, your Number is not registered is it corporate or retail connection and so on...In the whole process the connection is also terminated and given to some other customer and the result is NIL. You pay 3400/- for the USB modem, usage is 10% of it and that's it. RELIANCE an Unreliable service!!