What is the Difference between Pentium D and Pentium Core 2 Duo Processors?

Core 2 Duo is latest series of processors that are launched by Intel. There three major advantages is there in core 2 duo series than dual core: 1)FSB: Front side bus, in core 2 duo FSB speed is 1066Mhz and in dual core it is 800Mhz. 2)L2 Cache Memory: Core 2 duo proceesors have double L2 Cache memory than dual core processors have i.e. 4MB. 3)Clock Speed: In Core 2 duo processors, you will find that intel have reduce the clock speed of processors.