Any Sandy Bridge i3 (that's second generation Intel Core i3) will be far better than just about any Core 2 Duo unless you compare the very low power version to a top of the line Core 2 Duo and even then, the Core 2 Duo would still probably lose. I vote i3. I can't be more specific/accurate about performance differences without more information about the CPU models in question.
basically its like this
core 2 duo>intel dual core>core i3
what is rs 6500 american?
It's Indian Rupees 6500.. and I want to compare Latest 2nd Gen Dual core and Ist gen core 2 duo.